I sympathise with your point of view Nicolau, and I would hate it if anyone was put off by this sort of thing, which I have merrily engaged in myself of course.
But I think it serves a good purpose, it shows that we here are no longer in thrall to, or afraid of the WT.
Also it calls attention to the falsity of the things they try to make out are sacred, the Governing Body in particular, but the status thought by Elders and Pioneers to be something they are rightfully proud of, and even that the name "Jehovah" is not a sacred cow.
When I first landed on this site as an inactive ,but still indoctrinated JW, I was apalled to find a poster named Homerovah The Almighty (no longer posts, sadly) and the various other epithets that were in use.
But that is partly what kept me reading, I was fascinated by this brand new(to me) world of people who poked fun at my religion!
All in all, I think the good it does outweighs the bad, and it was a cathartic relief to use many of the terms for me, we may as well let it continue, we could hardly stop it anyway, but I do think we should always stamp on inaccuracies, half-truths and really vulgar use of language against the WT.
Apart from that, let the DumDubs , Gibbering Buddy and Piosneers etc. have it !