Just out of curiosity, why wouldn't it be practical? Is it because it's too physically heavy to carry? If so, the rear rack has casters and can be pushed around without a problem (see vid). I run errands everyday with the B and take it into restaurants, coffeeshops, supermarkets, libraries, bookstores, electronic stores, malls, clothing stores, etc.,

If you want to lock it, get the standard issue locks. Krypto U lock and locking it through the frame and to a post. 'Nuff said. They have nutted axels so the wheels don't have QRs. I'd get it spec'd with the telescoping seat post so you can pop your seat off and make it more unrideable.

Part of getting the B is folding it and taking it inside. Otherwise, you've just a bought yourself a very small bike. For me, I wouldn't leave it locked outside because it is a spendy bike and it sort of defeats the purpose of having a bike that folds so small.