muggers can be anywhere, especially with the economy still in such a bad state.
They can be anywhere when the economy is not in such a bad state. But the funny thing is that violent crime has generally been down almost every year since peaking in 1992. There were little bumps up in 2001 (about 1%, not including 9/11), 2005 (about 2%), 2006 (about 3%), and 2012 (less than 1%); you might remember the middle two as times when the economy was considered to be in a pretty good state. The final numbers for 2013 won't be available until much later in the year, but there seems to have been a relatively sharp drop in crime for at least the first half.
There's a lot of debate about why. Improved education, more resources available for the downtrodden, more career criminals in prison, the removal of lead from gasoline showing unanticipated effects... Pick your favorite. Whatever it is, we have 37% fewer overall crimes being committed despite 23% more population. That's basically half the crime rate we had in 1992.
If you're going to try to get someone not to use Glass, scaring them with warnings of random crime isn't really that effective.