Since it was a temporary thing....why not just remove the terminal block and replace it with another piece of terminal strip?
After he was done, take the thing out back and smash it with a brick so nobody can use it ever again if they find it in the trash.
Whenever I throw away something cheap-n-nasty (and unsafe) like that I always make sure to destroy it first. Don't want to be indirectly responsible for someone else's misery.
