Challenge Spam Madness
First it was Extreme Road Trip 2 (which is a game I love). Now I'm getting challenges from Happy Street, a game I don't have and am now even less interested in getting. ERT2 was updated to make it explicit (pick who you want to challenge), which is better, although it doesn't have an option to limit the list to only those who actually have the game, and it should have that.
I can easily see this getting out of hand with devs using Challenge Spam as a means of advertising, and everyone getting inundated with challenge notification after challenge notifiication. Apple needs to put a stop to it. Challenges should be limited to only people who actually have the game.