Yes Neo I know what you're feeling as I heard that news yesterday about the teenagers. Unfortunatley or fortunatley for me i skipped the legal highs and went straight to the illegal ones lol. But as for nostalgia i would say all alcoholics / addicts get it to some extent no matter how long they've been sober/clean. The brain tricks us to remember the 'good times' and forget the hangovers / comedowns / nose aches the next day :P
-x-