I used to have a mild issue with destroying alarm clocks. Lost a few phones that way. So I devised a different method, in which I would hook up a lamp with the cover off to a timer, which would have the lamp turn on a half hour before my alarm time.
To knock your brain out of sleep mode, light is required. When you're in a dead sleep, and you're woken up to a sharp exciting noise, grogginess is the result. Or in my case blind rage.
The habituation of this had the unfortunate result that it is very hard to wake me up without light. I will sleep through pretty much any alarm, up to and including a crew of plumbers or lumberjacks or what have you, in a circle kicking me in my sleeping bag.
I really really hate alarm clocks. I also hate my subsequent immunity to them. I can't bring a lamp everywhere.