Both have a good point, it's not to a player to judge what is banable and what is abuse, but obiouvsly LooR used a bug exploit.
I guess it's better to warn "exploiter" that you will report this to admin, and use "I" to contact an admin in game, or go on IRC, or take screenshot and post on forum (i don't do that myself as i don't like delation, and i don't care someone using a bug, i will just warn the player that he doesn't have the right to do such thing, but everybody is responsible for himself).
Tbh, i don't really like how this community make delation (like in scholl courtyard) but as the community is bigger everyday this may be needed.
I guess next time just try to contact an admin (actually there should be one when DTV is on a server).
Bugs have to be exploited to be detected, i guess best way to behave when you find a bug is to report it.