To be fair, I don't think people are being deluded by wishing the guy luck... I haven't seen anyone on here who genuinely thinks this will come off (let's face it, it almost certainly won't) - they'd like it to, but they aren't expecting anything. There's a big difference - I'd like to win the lottery, but it's not going to happen!
But there's no excuse for being patronising and insulting towards people who are merely offering a bit of encouragement. You probably think you're being so big and clever but you're not impressing anyone.
If you really want deluded, check out AmigaWorld.