I think our biggest problem with the Euro fans, or at least my biggest problem, is that while I want a little crowd participation, I don't RUDE crowd participation. Nothing wrong, IMHO, with yelling "USA, USA, USA", or "Europe, Europe, Europe" after shots, between games, whatever but jeering while a player is down on the ball... well, that bothers most players. That shouldn't happen... just good manners. On the other hand, part of what makes pool BORING to outsiders is the spectators are usually expected to sit in their chairs, perfectly still, mouth closed, hands on their laps like a 3 year old in "time out" sitting in the corner. That's ridiculous. Hell, I'd love it if the crowd cheered on a great shot or after a tough runout. At least it would have more of an excitement factor for the crowd than a Friday Night Bridge game at the Senior Center (nothing against Bridge, or Seniors... I am one!)
Keep in mind that the Mosconi Cup is a once a year, special event. If I was in the crowd in Vegas and JA kicked in a 3rail shot and got great position from a safety, I'd like to be able to loudly proclaim "That's What I'm Talkin' 'Bout" or at least applaud. Just not acceptable in our "normal" events to "cheer" for a player, and personally, I think that's a shame...
As for the rude fans... do them just like they do at baseball games, foot ball games, etc. If they get out of hand, throw them out... and there were a few that I heard, from what little live streaming I did get to watch of the Cup this year, that needed to be told to leave, but generally, we, as pool players, need to learn to NOT have to play in a vacuum. We might even get a little bit more of a crowd at some of the tournaments if our spectators were allowed to, or even encouraged to, act like it was fun watching the game. This is a game of skill, not a spelling bee... let the spectators get involved a little more instead of sitting there looking like they're not enjoying it! And if players CAN'T handle that, well, then maybe they need to take up checkers or something else that everyone will sit quietly and watch. Just my opinion...