If people want to boo lack of effort, etc., I think that's well within their right as a paying customer. You go to a restaurant and the food/service is crap, you let the server or manager know. You could use barber, mechanic, plumber, whatever as more examples. The paying customer has a right to let the provider know if his product/server doesn't meet requirements and/or expectations. I guarantee you that the server, manager, barber, mechanic, plumber, etc., don't make nearly the money that a pro-athlete does. How many times have we conveniently been told by players and front office people that "this is a business." That's right. They're not idols or whatever. They represent a company; a business. The difference is at a game, you don't have the opportunity to speak directly to the person providing the lousy product or service. All you have left to express your displeasure is to boo. So if, as a paying customer to that business, the goalie or whomever is producing a lousy product, you let them know it. Is booing rude? I don't think so. Maybe at a funeral or a wedding or somethng, but not at a sporting event. It's a business. You tell them when they are doing well, by cheering; you tell them when they are doing poorly, by booing. What's the issue here? Does it HELP the person or persons on the receiving end? It doesn't have to, but it can. Does it help to tell your server that your food was bland or cold or whatever? Or that the service was slow? It doesn't have to. The server can get pissy or spit in your food or whatever. Or they can try to make it right. Maybe it doesn't help your visit but it's improved for another time. If a player wants to internalize it and respond with "oh, woe is me. They booed." Well, screw them. Or, if they want to go back to practice and say "damn, I sucked. I was too busy thinking about my dog" and work harder or smarter or whatever. Great. The booing is an attempt to express displeasure with the product. What that product/service provider does with that information is up to them. What they do with that information says more about their character than it does about the effect or ineffect of booing. This is, after all, a business, and these people are not only supposed to be professionals, they're getting paid quite well.