They have a limit of 10 votes per voting method in American Idol, but it didnt help .The "State" vote that won it for Kris (if you believe this - I am not saying it is a fact, just that it seems to be generally accepted that it happened) still went ahead because if you are willing to spend the money, you can achieve a lot.
But, I think a number of votes per phone number would make it fairer. You couldnt say one vote per number because you may have several family members wanting to have their say, but you could limit it to 10 like above.
Maybe its time to change the format of the end game - I'm not sure how though. Maybe if the judges pick the bottom 2 and then the vote is for who you want out. They probably wouldnt do that either because they want all the money.
I think we will just have to live with it. To be honest, I am past caring who wins, the truly talented will all have careers and if a crap contestant wins they will lose their contract like Leon and Steve did. (Sorry, I actually quite liked Leon, but Rhydian should SO have won that year based solely on talent)
Its time to maybe stop taking it so seriously. I know you can't moan about who goes home if you don't vote- but if we all stopped voting because we think its a farce, maybe it will change.
But I doubt it. Because the majority of people who vote will continue to do so, no matter how outrageous the outcome.