Well, amongst my friends I was known as some kind of "Suffkopf" ("booze head" or whatever you'd translate that to), and so one day that song played, and as it's one of my most favorite childhood songs, I couldn't hold myself and partied hard. And eventually they saw a link and nicknamed me "Narcotic" for the fun of it. The days of SUFF will never end.
Also, I adored "Schaumkraut" (Cardamine) in Freelancer vanilla, which is obviously a drug/narcotic.
And my first server character (Lee) was a cardamine sniffer (named "Narcotic").
Almost anyone who has played Warcraft III will most probably identify what razorviper relates to. Razor and Viper are both nick names of the two of my favorite agility heroes 'Lightning Revenant' and 'Netherdrake' respectively.
The Prowler callsign I've used always in gaming or chatting. I been trolling since the days before internet and we all used hyperterminal and billboards. As the internet boomed I couldn't use Prowler anymore as it gets taken often so I've used ProwlerPC since and it always seems available for me to use.