linked into the group system
ulx "cantouch"
Anti trap
ulx "removeprotection"
ulx "addprotection"
pretty basic but useful in ways that if players are abusing the protection it can be revoked ie abusing it enough to not get banned but still punished
The ability to clean up players props even after they leave is a must ie script doesnt remove their name until the remove timer counts down or the button is clicked
The prop protection will not be reliant/incorporated into ULX.
I understand your suggestion though. Allow an individual player, specified by admin, to have his props touched. Perma-add-everyone-to-buddy-list type style.
I don't believe it would be overly difficult (though I could be wrong). Somehow set a variable on a player that adds all other players, current, future joined, or otherwise, to touch his stuff.
Autoclean up is already listed.