According to Biblegateway, apostacy is
ə pŏs’ tə sĭ (מְשׁוּבָה, H5412,
apostasy; παραπίπτω, G4178,
to fall away).
The abandonment of one’s religion.
This simplistic definition is, roughly, in agreement with every major encyclopedia on the plant, Christian or secular. It's like saying, "I am leaving this house I am not in". It's a logical conundrum, not apostacy.
In the NT apostasy occurs when
men turn aside from following Jesus (John 6:66 f.) and deny Him after having previously confessed Him as Lord. It manifests itself in falling away from faith under persecution (Matt 24:9-13), denying the deity of Jesus (1 John 2:22), or living a life of open sin that denies the faith (2 Pet 2:20).
Well, that won't work if all translations are corrupted. The NWT is strangely absent from BibleGateway's exhaustive list of translations.

What does the NWT say?
- PEOPLE “IN THE LAST DAYS”; APOSTATES ALREADY PRESENT (3:1-13)
- People will love themselves, money, and pleasures instead of God (3:1-5)
- The folly of apostates will be plain to all (3:6-9)
- Paul’s example of endurance (3:10-12)
- Wicked men “will advance from bad to worse” (3:13)
For starters, so far so good.
(3:1-13) makes no mention of the Apostolic Fathers, or, it must be demonstrated that the Apostolic Fathers meet the description of the worst of amoral low-lifes, who seduced weak women. They weren't Christians in the first place. The only historical evidence available is what they wrote; such evidence would be acceptable in a court of law, if the AF were to be charged with apostacy today. No such evidence exists.
The Watchtower Society lists 1,132 definitions/examples/attributes of apostacy or apostates. This one is where the trouble starts:
The Watchtower (1983)
Why So Many Religions All Claiming to Be Christian?
apostate Christianity. Among these were Alexandria and Carthage, in North Africa, and Byzantium (later to become Constantinople), at the frontier between Asia and Europe. In the West, a rich and powerful church developed in Rome, the capital of the Empire.
Watchtower ONLINE LIBRARY™
It must be demonstrated, that the North African councils that defined the canon of the NT used by everyone today, including the NWT, were apostate councils. This is illogical and self defeating.
OR
the canon of the NT was the result of agreement by a plurality of elders, apart from the historic Church. There is no historical evidence, secular or Christian, to support this theory.
A rich and powerful church developed in Rome... What "power and wealth" and how was it used? This is where historical fabrications sneak in. It makes no distinction between Christian Rome and pagan Rome. Dave Hunt commits the same error. Pagan Rome ultimately embraced the Christian faith. It took 4+ centuries that could never be accomplished by human power. Wealth was used to feed the hungry, not for lavish lifestyles.
You may have heard it said, “The blood of the martyrs is the seed of the church.” It’s often said to point out that persecution, rather than diminishing the church, often has the opposite effect. It’s counter-intuitive. Where do we get this saying from?
The original source is the early church father Tertullian (~155-~240 AD). He was an African church father based out of Carthage. He lived in the days of the Roman Empire and so was familiar with persecution and martyrdom. Tertullian’s most important writing is entitled
The Apology, a work in which he provided a defense of the Christian faith to the provincial governors of the Roman Empire. Towards the end of the document, Tertullian makes the memorable statement: “The oftener we are mown down by you, the more in number we grow; the blood of Christians is seed” (Apol. 50.13, original Latin: “
Plures efficimur quotiens metimur a vobis; semen est sanguis Christianorum.”).
There is some variation in how these words are translated in various English editions. Many translators have felt compelled to add some words to explain what the seed is going to produce: faith, a greater harvest, the church, or a new life. However, the context is clear enough. Tertullian believed that God uses martyrdom and persecution in some mysterious way to cause the Christian faith to grow in strength and numbers.
No emperor ever killed an apostate, there is no evidence to the contrary.
Another problem for the WTS, and fundamentalists, is they can't name any martyr from the 2nd, 3rd or 4rth century, yet they talk about "the blood of the martyrs" in Revelation.
The WTS indirectly asserts Tertullian, from Carthage, was an apostate. Nothing in his writings, available on line for everyone to see, even hints at such lunacy.
3:1-5 suggests idolatry, IMO. It must be demonstrated that the Apostolic Fathers meet the description here, by examining what they wrote, and more importantly, the consensus and unanimous agreement that went on for centuries, even after the canon of the NT was ratified. Since they were all allegedly apostates, the only way around this problem is to change the meaning of "Apostolic Fathers".