You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
ValveTime.co.uk | Valve News, Forums, Steam
And by 'most illegal', think of in terms of imprisonment or fine. Like if murdering someone is a 500 dollar fine, and jaywalking is 20 years in prison, jaywalking is your most illegal thing.
As for me.... I dunno. Most likely piracy.... on the high internets. Or some obscure security thing that I didn't know about.
Or that one time in Reno when I shot a man, just to watch him die.