@Hall89 maybe you like to participate in some surveys, you can find them here in the forum, since I think it is very important people get to know about this. Especially with the upcoming legalization of cannabis in many countries. In germany we are also planning that, people dont seem to believe the obvios risks and already official politicans are talking nonsense, cannabis as a healing or something (there is no advanced studies on that, only on chronic pain, which doesnt leave out the side effects of course).
I think with HPPD a lot of people seem to hide, I think you should accept yourself having HPPD and go on, that also means, giving others advice on the negative effects of drugs. Maybe some users get prevented from developing HPPD if they know beforehand that that could happen.