I can be reached in several ways. The easiest is by mail — x1bpsas66na001 @ sneakemail.com (yes, the address is supposed to look like that, it’s a spam protection). That method is also the most drowned in spam (still a couple hundred a day), so if I don’t respond, it’s not out of disrespect, I might just have missed it. If so, text me. And by the way, for even remotely sensitive stuff, always encrypt mail for me.
Otherwise, call my cellphone. +46 708 303600. Or text. Texting is usually the quickest way to reach me.
Oh, or you may mention Falkvinge on any webpage or Twitter, and I will notice. One distinct advantage of having a globally unique name.