[hobofan]

> One thing I can promise you though, is that you do know people who are taking stimulants. They just aren't telling anyone

Yeah, I guess so. I'm also in Berlin, and a lot of people take some kind of stimulant. As someone not taking any stimulants (not even coffee), it was quite hard to spot it in the beginning. At one point I was working with a larger group of people and only after a few months I was told that more than half of them were on some kind of stimulant almost constantly.

[kaybe]

So how do you spot that?

The closest I came was when I had some papers on my desk that were given out for free somewhere and somebody informed me that that was used mainly for smoking pot. I had no idea.

[hobofan]

It's almost an opposite of Hanlon's razor: "Attribute to drugs what you could attribute to lack of sleep (or similar)". That plus physical tells are the biggest indicators. In the end I wouldn't say that could give a definite evaluation if someone is using drugs or not in most cases.