Camping the Pipe

so is it normal to use sandbox to bring some hord characters and kill everyone there when timer is done? there's a guy named 'shatterfade' (alliance) has like 9 pipes in AH , getting online only when the timer is off and bring like 5 hordes with him get the pipe and go offline

IS THIS EVEN LEGAL ?

long as he's not using bots it's perfectly legal.

100% using it , i mean everytime he log in all hord char log with him and kill only other players .. when he finish they go off