DLC Unlocking On-Disc Content
Worst Example: Street Fighter X Tekken
There is no excuse for this. When a consumer buys a game, they're buying rights to all of the content on the disc and asking them to pay another couple of bucks for a 105 kb unlock key that lets them access it is on the margins of criminal.
The argument's been made that including various DLC on the game disc is necessary to keep the multiplayer community from fracturing, but again this is total bullshit. If you don't want to fracture the community, don't lock the gorram content!
The Solution: Never lock any content on my disc and ask for more money just so I can use it or I will find you and you won't be happy.