I agree.
The worst is when you're making pong, and forgot to delete the projectile when it passes the paddle, and then the pongs multiply out of control.
So you kill it, reload it, and they do it again.
That's the worst D:
Here's a trick you can do easily when you have events and you don't want people to bother you by clicking them repetitively:
1- Open events menu
2- Uncheck every event
3- Done
Just recheck them whenever you want them to be active again.
Or just shut ray casting off on the brick.