Chap,
Give it a go - it's not for you, or some of the other posters on this thread, to decide. Don't ask, don't get.
I got in (albeit 20 odd years ago) with a couple of black marks against my name - both to do with youthful idiocy. It hasn't stopped me rising to a rank I never would have believed when I began IOT (no, not Flt Lt). Also, on my intake was a young man who had just lost his licence for boozing a couple of weeks before IOT - he's now a very successful, senior ranking, fast jet mate.
Give it a go. Just use the experience as a learning opportunity and apply the lesson in future.