FBI fraud squad raid. Guest who checked himself and family in locked the door and wouldn't leave till the cops busted in 2 months later. Guest O.D.'s on heroin after weekender and I find him with junk stuck in his arm, dead.

At my company I see tons of e-mail spoofing that gets in even though "common sense" should warn you not to click on links from an unsolicited email with .ru extensions in the address, but it happens. On my friends home networks, the #1 way in is of course porn. ;-p