I go from the threaded side. I cut the stud off, hit it with a little grinder till the swedged part is gone, while it's hot hot hit it with some wd/pb and tap it out opposite the way it went in. They are tapered and if you drive them out through the front it can destroy the splines. Look at the pic above where the heads were drilled, they are splined only so deep, so you would be driving the larger diameter non-splined area through the splines opening the hole. I also do not sledge, maul, or frail, or hammer axle, hub, or anything that is being supported by bearings.
