The issue is this - no one "owns" any of the spawns in EQ. While most people would agree that doing the above is considered anti-social behaviour and frowned upon, it's nothing we as GM's can restrict.
This is also true not only to Crushbone or other "Noob" zones. Some people consider raiding Emperor for keying alts when your guild is in PoFear Status the same. Should we block that also? Lev70 "raiding" Guk is about the same issue.
Don't get me wrong though, the entire GM staff dislikes the above mentioned behaviour and we don't support it by any means. Personally, i'd like to see a level restrictions (let's say lev40 max for Crushbone) but that in return would make the powerlevelers go crazy

So in short, best to hope for some honorable players that won't do such things and if it goes crazy, take a Screenshot, take it to tells and PM the GMs about it if none are online. Don't train, curse in OOC or do other things tho that disrupts the fun of your fellow players.
Edit : Everyone also might want to check the
Server Rules especially the section about the Play Nice and KillStealing/Training Section and the part where we ban your account for doing things like this.