A few things are to be taken in order. First, don't be too quick to blame imgflip. Each stream has its own owners, own rules, and their own moderators, and as such their own moderation style. Since the thread of account termination was there, it might be safe to assume you did have to deal with a site moderator, but some stream moderators may not be aware they cannot do such things, and threaten with threats can cannot live up to.
Second, I do not know what you wrote about pedophillia, but I do know this about pedosexuality in general, and that is that it's a subject only a few people can handle to the full and correct context. Even politicians fail on this subject, if you ask me. Pedosexuality is a subject that revolts people and disables them to think properly and all intelligence goes completely in black-out mode. I know this does the solution to the problem about pedosexuality more harm than good, but that's the way it is. Many "proven facts" on this subject are actually bullcrap. 99% of the "defending pedophiles" accusations I've heard over the years, since I've been digging into this stuff (it's very extremely complex stuff, I tell ya), are either wrong or based on narrow-sighted views.
Many stories on this front have led to people taking the law into their own hands, and that's where stuff gets risky for imgflip. Although imgflip tries to uphold the freedom of speech as much as they can (at least in their general TOS), they must take utmost care, as they can be held responsible. And not allowing attacks on pedophiles does not mean you are "defending" the phenomenon either. Trust me, the subject is by far more complex than that.
Now when it comes to discussing other sexual orientations in combination with pedosexuality, then things also get complex. You know that many people are distrusting to anything not heterosexuality, and people easily link one to another. Some countries even based their laws on the misguided idea that every non-standard-heterosexual would be pedo.... Yeah, that's silly, narrow-sighted and repulsive, but alas they really did despite all that.
Also you should be careful with spreading accusations or even suspicions. Especially when it handles pedophillia. Some people have been lynched already on accusations like these, while they were irrefutably proven innocent. Imgflip could get in legal trouble for defamation. There is a load on the line with this subject.
(to be continued)