Answers from what I've seen to date
1/ Steering wheel is removable type but unfortunately too big to put in your pocket.
2/ Yes wheels took be taken off, but I'm not sure how large the market is for stolen wire wheels, but wouldn't have thought this would be to great an issue.
3/ The security fixing might be a good solution especially if your storing expensive crash helmets somewhere.
Maybe we need to look at a TM bulk purchase.