This is a general post, and I'm talking across the board because I've seen it happen more than once and I wasn't quite sure what to make of it in the beginning. I come from an old school background, where authors, editors, agents, and publishers never did or said anything in public unless it was done in a professional manner.
And, sometimes the less said the better was the best way to go.
But there are those in publishing, particularly authors, on the interwebs who rant, insult, scream, and shout. They cause trouble wherever they go and they seem to attract a small following, too.
These people are wing nuts. Don't pay attention to them and don't let them get to you. And don't ever trust what they say. They don't matter, and nothing they say ever will matter. Time usually takes care of them.
There are ways to handle situations in a professional manner and ranting with profanity isn't one of those ways. You can write the most wonderful book five years from now, but everyone will always remember that time you ranted and came off looking like a wing nut.