4) Beautiful Katamari Extra Levels
Beautiful Katamari was an early exmaple of a particular kind of DLC offensiveness: for a few dollars each, you could play an additional 4 levels that were already on the disc. Nothing to download, just unlocking something that was already there when you bought the game. It's like buying a sandwich and being told if you can add lettuce for a few dollars, when the lettuce is sitting in a plastic baggy in the sandwich already. If Subway has more decent business practices than you, there's a problem.
While other games have done this (Mass Effect 3 is suspected of this, in case you forgot one of the many reasons the internet hates it), they at least usually have somewhat decent content there to unlock. Beautiful Katamari's extra levels were nothing to talk about. Not sure why it would be so tough to make levels that follow "a bunch of crap to pick up" model well, but here we are.
3) Anything for XBOX Live/Playstation Home Avatar
No way are you telling me you have the OFFICIAL N7 armor on your Live avatar? Wow now the world know that you are wildly irresponsible with money AND that you think playing dress-up with a bunch of virtual polygons is a worthwhile pursuit.
2) The Saboteur The Midnight Show
This might not be the worst offender on the list, but it's definitely the most disturbing: "The Midnight Show" puts nudity in the game. That's (mostly) it. There are strippers in the Belle de Nuit ('Beautiful Night') club that are normally covered in tops and pasties, and this DLC removes that. So, in essence, you're paying for less content. There were definitely people who were a-okay with it (who had apparently never heard of "the internet" and "more pornography than you could watch if you dedicated the rest of your life to watching internet pornography available for free"), but it's just smacked of creepiness. If you're going to include it as an option, that's fine. It's still super creepy, but it's fine. But to make people pay for the privilege to see videogame nudity? They would need to include a shower DLC, to wash away the shame of buying "The Midnight Show."
1) Railworks: Train Simulator 2012 Everything
If you want to buy the complete DLC for Railworks: Train Simulator 2012 remember, a train simulator it's going to cost you over a thousand dollars. Yes, dollars. US Dollars. Let that sink in. While, I've never played it, I'm sure Railworks is a fine train simulator maybe the best train simulator ever. Hell, it may have been the greatest game ever that does not excuse over a grand of DLC.
Plus, they didn't even include nude trains.