When you want to report someone there should be more things to report for like cyber bulling deleting and more. Tell me more thing to report for. Oh builderman or any person that works on roblox please read this.
"So what's not a real offense?
We don't consider these real offenses - Calling each other silly names like noob and dummy, shooting each other in games set up for bloxxing combat, killing members of your own team, pushing each other off terrain that is high. Those things are just part of the game. Also, we can't enforce the rules of any one's world so if you want a "no killing" place then take out the weapons and dangerous terrain!
Remember that your rules on your place are not reportable, so if your place says "don't steal the flag" and someone does exactly that, we won't do anything to that someone. You must make your own systems to deal with them if you want custom rules enforced, we won't do it for you." Straight from the wiki.
Don't belive me?
http://wiki.roblox.com/index.php/Rules#So_what.27s_not_a_real_offense.3F