The only 'problem' now are the 'drug' dealers on so many corners of downtown Lisbon who sell fake drugs to tourists. They come up in your face and try to sell to you a few times per day and it's really annoying. Now, I spot them from far away and already make the no signal with my index finger w/o looking at them, but this doesn't always work. Once I was way in the back of a restaurant but with a clear view of the front door/street. One such dealer stopped at the entrance and pointed to his nose (to mimick snorting) until I shook my head so he'd go away. Since they sell fake drugs (basically to tourists but also they try with locals), the police can't do anything.

A minor problem, all in all, considering what has changed here regarding decriminalization, but thought I'd share.