If that was a webpage sponsored and maintained by Boyne Inc., and if that was not the first offense (or, more to the point, this guy was also causing trouble on the mountain or was an ex-employee or something), well then... it's private property after all. If we were all paying Scott for something- say dinner every night (hey Scott, whaddya think?
)- and then we got on Scott's page here and started ripping him, then yeah he would be justified in banning us from the site, or no longer serving us dinner, or both.
I'm partially inclined at this stage to give the benefit of the doubt, simply because we don't know the whole story. Yes, if this was the only thing this guy had ever said about the ski resort, then this is probably overkill. And if it isn't a resort-sponsored thread then it's pretty dang creepy knowing resort managers are watching the sites looking for season pass offenders. I'd opt for more info though before making a final decision on whether this was crazy or not.