neither should he, we are supposed to be a like minded community
Wouldn't really call it an attack as such, as he was asking a ridiculous price for his car and someone called him on it. If words like "lying cheating thieving git" had been used then that would've been quite inappropriate and would've deserved some kind of modding. Should a community let people rip off it's members, whether it's intentional or not? I've not been here long enough to speak for this place, but personally speaking I feel that any kind of locking or censorship of FS sale threads does nothing but hinder the community as a whole.
There's a difference between passing comment and having an uncharitable pop at someone.
Do you really think that anyone would have been ripped off and paid that price for it? Its not like he's selling something so obscure that someone could be bamboozled into thinking its a good price. There are comparable cars on this very site, Autotrader, Pistonheads et al. As Rich mentioned, anyone who has such a wealth of information and still pays wildly over the odds for a car doesn't need protecting from the seller, they need protecting from themselves. To suggest that spamming a sellers thread with negative comments is an altruistic service to potential members is either naive or not being entirely honest.