There were cops there all the time - but honestly, it seemed like they were mostly just maintaining order, not stopping the dealing. The "unofficial" rumor around the city is that the police department worked to corral most dealing into specified locations (think: Hamsterdam) as a part of their containment strategy. Sure they raid it once in a while to nab up some dealers, but I'm still convinced that was just for public appearances.
We've gotten somewhat fortunate though, as the violence hasn't ticked upward much at all in that area due to no turf wars cropping up in such a prominent area. I think the city would be a lot harsher on the area if that changed.
I just wish they had chosen to corral the crack dealing somewhere away from the street with all the bus stops on it. It makes it feel unsafe to commute downtown on the bus.
In all honesty though, I used to stay late at work once in a while, and sure the area feels rough at night, it's almost always harmless.
edit: There was a street downtown near Lake Union when I had to work for a client in their Lake Union offices. On my way on a late night project I happened to drive right along one of these 'corridors'. It's not Pine/Pike, but further North and South of Lake Union. It was basically an entire row of street blocks that acted as if it was an invisible barrier. It was very noticeable there, and elsewhere as well. I think it's a new type of policing strategy.
In SF, the police have established containment zones where typical low-level crimes (like dealing, prostitution, disorderly conduct, etc.) are not pursued aggressively (if at all). For example, 6th and Mission neighborhood and the Tenderloin. This way the undesirables have an incentive to gravitate towards these areas, and it's easier for the cops to keep an eye on them. Sure, it sucks for the regular people who live there, but it is what it is; it keeps the rest of the city "clean" and the taxpaying public happy.
in Cal Anderson park that's a roundabout way of saying "always"
Or it's a conspiracy, I guess.
http://spdblotter.seattle.gov/2014/08/11/man-arrested-after-...
More information: http://www.capitolhillseattle.com/2014/08/man-arrested-for-u...