If you have your quick menu open, with a friend standing in front of you, when you click to change from seated/standing play modes, the menu will sometimes disappear and instead you'll end up selecting your friend, which will open the menu where you can block your friend, and the position where your controller (laser) is held is exactly where the block (or mute) button is located, causing you to often accidentally block or mute your friend.
It would be really cool if blocking a friend could have a confirmation box.