Pentakill Craziness

Please. If you want to try for a pentakill, please warn the team in advance. If I see an enemy nexus in front of me, I'm attacking it, unless I have advance notice to hold off. I'm not psychic. I'm not deliberately trying to ruin your chance at a pentakill. I'm trying to win the game. Just a little prior warning would be nice, before yelling at me after we win.

(Note that I'm not talking about a pentakill in progress, since it's a little tricky to warn people during the action.)