It's only abusive if hosts are morons.
You don't need this on a Freebuild, you'd only need this on a DM or TDM. If the host is forgeted up enought to enable this in a freebuild it's his problem.
Or as a alternative to be able to be used on any gamemode, the event only works if the brick owner is a admin, super admin or the host. If he isn't either and the event is triggered, the event owner gets banned permanently for "Attempting to abuse events".
JailEventbait for the win.