Ok I've only been here for a year and I don't know how it used to be but I lurked for ages and saw in action exactly what pretty is talking about.
I am a member of several other forums and it is not that way - everyone is respectful of others' views and takes pains to validate these before putting their own views forth. To say I was shocked was an understatement, but, here's the thing, I was also intrigued at the blatant 'other people bashing' on AIBU it just seemed so - cathartic or something maybe just weird??
Can't explain or justify my intrigue but it led me to post a fairly innocuous AIBU and see what would happen - I got flamed, some posters completely ignored what I said and they kind of rewrote a character and story for me and then they all posted about that wicked character and story instead of me and my original post! Some posters responded to my post normally and actually kept to the point and were helpful, but others deliberately derailed it to be goady and chatted amongst themselves about how rotten I must be.
Since my OP was insignificant and I was fully aware this may happen I found it a real laugh and wasn't over bothered, more amused at my character assassination, and the nice guys prevailed in the end, but I have to say if I had not been lurking for a year and had thought it was all going to be normal I would have been really offended! Others will be!
Some people will come on here not knowing this is what happens and will not be expecting it!
Anyway it is a hoohar or a keffuffle IMHO!