I'm assuming like anything else it varies.
I know one FTer on FT manages to antagonize a # of folk, but all say they like him after interacting w/ him at dos.
I know another FTer who refuses to go to any do that another FTer is at, due to something several years ago (refusing to go to a do w/ multiple people due to a diss is a bit extreme IMO, but to each their own).
I know others who, if they're at a small do, just sit down at the opposite end of the table to avoid interacting w/ another problematic FTer, so they get to enjoy the do & ignore the PITA person.
And others who figure (rightly IMO) if they're at a MegaDo (50-150 people) the odds of them encountering a PITA FTer or interacting w/ them is small & there's always lots more other folk to chat w/.
I've been on FT for a while. There are a number of FTers I adore, a lot I like, a lot I'm not overly fond of, but none that I hate. I figure I can hang w/ the folk I adore & like, & ignore the ones I'm not overly fond of, etc. It's like any other company, association, society, neighborhood, etc. It takes all kinds to make a traveling village...
In fairness I've never gotten into major pissing wars that you describe, so my feelings might be different if I had been, but over the years there's just not that much to get excited about - or, there are more important things in life to worry about, such as breast cancer, H1N1, wars between countries, floods, fires, etc...
OVMV. Cheers.