I'm with Tightslot too. Completely pi$$es me off when idiots like Irishwingz think it is their god given right to sit in business, when they haven't paid for a seat. People pay good money to sit there so why should they have to put up with some pleb who just parks themselves there and seems to believe they're entitled to it.
If you want to sit in business or first - PAY FOR IT! Simple as that. Don't be a smarty pants and just go and sit there. We KNOW how many are supposed to be there and where they are to be seated and we know them by name too, so it's certain you'll be caught.
Have a nice flight in economy where you belong!