Anybody else noticed the drug dealing / using in the West End getting worse?

I have noticed it getting steadily worse for a few years now but it reached ridiculous proportions yesterday when a group of 10 (or so) drug users were buying from a guy in a telephone box (on Charing X Road, 9:30am!) with the queue for drugs completely blocking passage through for pedestrians. I decided to ask one of them to move and was chased away by a screaming fiend who ran after me for a couple of hundred yards until I ducked into a shop. I have also seen people injecting / smoking crack in the streets / phone boxes, its become like the 90s all over again.