Gun crime much lower, but when it happens, SHIT REALLY HITS THE FAN!
Do you know how a country of no guns responds to gun crime?
I can drive for 15 minutes and reach my local chav land where some of my friends live. If I talk to them on skype, some of their local people will ask me if I'm posh. When I went to a fireworks display there, a young child was talking about "deh billy boys gunna ruff em up if dey come in here, cuz duh billy boys are da best". Billy being a slang term for the village.
Teen pregnancy is a problem, but one I've never actually seen, and the earliest I've heard people actually talking about having had sex was in the years of secondary school, and even then it was only by the select few complete idiots. They're weren't actually stupid, they were just teenagers with the extra added ideal of "I don't have to bother in school". I know some of my friends were in sexual relationships, but they started those around the legal age, and I'm pretty sure most of them are STILL in those relationships.
I know of a few local stories of people committing suicide because one of the local secondary schools is shit at controlling people. I had no idea until some people I met at my college told me stories about how they got group beaten and had to crawl to some teacher's office bleeding, because they couldn't walk. This very much suprised me and disgusted me. More interestingly, this was an anecdote of a female. Fights involving females and going beyond shouting are very rare.
I can however say I've never been mugged or robbed. I live in the country side, 40 miles from London.