option for private rpb boxes

[I-0]

please please please i hate getting into a fight in some hidden interior but because it's a shit arena we've gotta run outside and suddenly everyone who sees us fight knows i killed jfk

i dunno, just like. if you start an rpb in an interior zone, throw up a thing like "would you like to be given a flat arena to fight within" and if all participants smack (YES) everyone in range is warped off to an Arena Cell for the duration of it

if automating it is too ripe for abuse, maybe just put into writing some procedure where a private arena can be ahelp'd for so it can be figured out on a case by case basis