So, i came up to this idea(due to the trucking event), if some event is going on in /stunt and as usual, there are noobs who like to ruin things with their childness, lock the command up.
Yes, i know about TT worlds but that won't stop /goto.
About inviting:
It should send the player a message, that 'You have been invited to join /stunt, please do /stunt to join.'
EDIT: Also kicking from stunt mode back to /race.
Once kicked, invite gets reset.
EDIT2: We could also have a new mode that is like /stunt, but no objects and only two commands, /goto and /nc.
EDIT3:
Just a little another idea, there could be a world that people in a list can only enter.
Like /f1.