I love to blind an enemy. Then kill him. Like wise if I know I'm going to die, I leave a little pressie. Usually I find my final flash helped some one kill my slayer.
Like wise I like flash bangs to teach glitching scum a lesson. So in team games (my favorite). If I find a player on my team cheating. I teach them a lesson. You ruin our game, I will ruin your fun. Or at least make it harder.
Alas, this can only go so far. Hopefully Con2 will phase out smelly cheats.