I'm not on FV, but someone like that would have to really go out of normally used areas and really search to do that to my afk group. And honestly, if people are sticking AFK groups in places/camps that gets traffic then it's kinda hard to blame. Although this guy just sounds like an asshole.
I don't go around training anyone, but sometimes I go to camp crap for the artisan quest that I can't camp anywhere else and there is an AFK group or an AFK mage/merc right there. I don't blame them, I do the afk/merc thing on those myself (never actually have a bot running...for that), but I don't respect them as having any rights to the camp, nor do I expect any when I afk/merc over night. I just pull around them. including what they're fighting and have no problem with someone doing the same to my afk/merc overnight.
Sometimes I come across afk bot crews in current camps that I want a shot at for certain drops that I can't go somewhere else for. Problem with this is 12 hours later, 48 hours later, a week later, they're still there. Obviously they're not camping the no-drop gear drop that once they get they'll leave, but are camping the rare bazaar drop to sell to make plats to make $$ and they're not leaving anytime soon this year. That's a problem. I'm not training or reporting anyone, but I don't like or respect that.