I'm with Barracker on this one. No list of banned words on either side, just the possibility to dispute the way they are used in practice. Thus, for example, the T word used of GC women functions in exactly the same way as "witch", "bitch", "harpy" - it shuts down discussion by othering the person being talked about.
I will concede that "handmaiden" often works the same way, and is not a good word to choose if you're trying to "talk to the lurkers" (any more than "Remoaner" or "Gammon" are, on say, Brexit threads). So as a tactic in arguing it's not a useful one. Though sometimes, when one is feeling utterly frustrated at someone's arrant stupidity in being merrily prepared to throw women's rights under the bus, and, what's more, claiming to do so in the name of "feminism", it's hard not to lose one's temper and reach for a deliberately provocative name.
However, there is a crucial difference between the T word and handmaiden, which we need to remember. The former is used by members of the oppressing class to demonise members of the oppressed class and prevent their voices being heard, while the latter is used by members of the oppressed class to express anger at those of their peers prepared to take the side of the oppressors in doing the silencing. Very different power dynamic, IMO.