The issue of drug trafficking is a weird one. Locking up all the dealers wouldn't completely clear the problem, but it would help, and like Mountain said said, doing nothing obviously isn't helping.
When I was at Central Park the other day I was surprised by the downward vibe of the park, and thought maybe it was just a 'one of' type day, but it doesn't sound like it. I haven't been downtown near as much as I have in past years, due to work and vacation, etc.. but it felt different than in past years.