http://www.28dayslater.co.uk/forums/...ad.php?t=51251
i found that one to be interesting if a bit dangerous.
i read the whole thread and it ended up in the newspapers and the company that owned the site expressed how concerned they were at the breach in security and they had to hire a steeplejack to retrieve the flag they left up there
well the flag had the forums web address on so the steeplejack joined the forum to thank them for earning him £300 he also returned the flag and told them to keep up the good work he he.