The crime and corruption while not as bad as some down-island places (Trinidad, Venezuela?) is at a level that it really can't be compared to any stateside city. I make this comparison after moving to St Thomas from previous stints in East LA and Oakland, keep your eyes open and your wits about you in the USVI and you'll probably be alright.
I'm not sure I understand your comments about crime. Do you think it's worse than in the USA? Is it just like anywhere you go, just stay out of the "BAD" areas and things are much safer?