Pretty much echoing everyone else's experience on live primers. I've done it for years. Light consistent pressure applied with a decapping die is all it takes. If the anvil seperates or the primer compound crumples apart, cull the primer, but generally they come out without any perceptible damage. Yes, I've reloaded with them and can't recall any failures or misfires.
It's not the ideal method of reloading, but refrain from using them in carry or competition ammo and you get that extra ammo for plinking at the range and safely detonate what would have been an active waste product otherwise.
Truth be told, I've only had one primer light off and that was while priming a case. Seems I barely touched the thing and "Bang!" I wonder if it wasn't a static discharge or something or a hyper-sensitive primer element.