I personally always run bladder shocks. By removing the bump stops, the piston would hit the bladder and that's something I don't want to happen. That means I'll always run bump stops. If you aren't running bladders, and you really always should be, check to see if the piston is capable of moving above the actual shock body at all and into the cap. If it doesn't, running without a bump stop should be fine. If it can do that, leave the bumps stops on. I'm at the point where I've decided to never run a V2 rear tower.