From Toyota center website They'll sometimes check your sign at security outside. Sometimes they'll have you scribble on the unused side to prevent you from writing on it. When I need a spur of the moment sign I'll lightly scribble on the back of a sign in pen to get by security, bring a sharpie to the game, then write what I need to during the game. In the past, when I've had opportunities to sit courtside, or even in the "letter named rows" behind the goal that aren't actually on the floor, I've had security tell me I couldn't hold up my sign, even when there wasn't any play going on. I'm not sure what the cutoff row is or how strictly it is enforced.
