no you still need an off switch as you still are spawning lot of entities & will place a strain on server hardware, plus if your playing on a server & not online its not right to have lot of automated stuff running, if there is any spillage your not there to fix it & will effect the players that are online, most admins will trash what ever is making the lag & then deal with the offender when he/she logs back in, in sort any & all automated systems require an off switch & really should not be running while player is off line, mho but upheld by most server admins, lets face it, its just logic really.