I've met a few players over the years. Mostly 10+ years ago when I was working at a Pro shop near the Shark Tank in San Jose and mostly not players on the Rangers. But to the question, no. It's just being polite.
I did get to talk for some time with Paul Martin at a bar where him and some friends were hanging out. He did remark after I told him I played that guys in the league don't mind criticism as much from people that have played cause, its hard to articulate, they still think about it as like just playing some hockey. He did say its tough to hear when its a bunch of writers and bloggers who only cover the team cause of a paycheck or to shit on someone.
He was a really nice guy. Put it the way we would say it after a beer league game. We know when we sucked. Haha
I would say if you get into a situation where you can speak with them for longer, got to actually know them, it would probably be ok to ask questions and be critical, but to randomly shit on them, that's childish.
I am also guilty of being upset at bad play at games and calling them out. Need to be better about that. Especially now that the crowds at hockey games are much more, lets say well mannered, than they used to be.