Remember when people used to take personal responsibility for their actions instead of demanding that everyone cater to their needs?
If you have (insert mental disorder here) and playing Diablo makes you all wonky, then STOP PLAYING THE GAME.
It's not their fault that you're suffering. It's YOUR fault because you are too stupid to know when to quit doing something you shouldn't be doing.
I have one arm. Do I try to open doors with my left hand? No, that would be STUPID. Someone used the analogy of a wheelchair and stairs. While that's a little extreme, I disagree with the poster. You SHOULD get over it. You're crippled. That's a fact. You can't climb stairs. Fact two. So do you !@#$% at the business owner because there's no ramp and he's an insensitive @$$hole? No, you just go shop somewhere else. He pays the price because you didn't buy from him and he lost out on the money.
If lights and colors and shaking mess you up, then STOP. Get off your ego trip where you think you can command other people to do your bidding and accept the fact that you are screwed up and there's some things that you just can't do. If I'm 5'0", I'm not playing in the NBA. I'm not going to sue the NBA and demand that they make a height limit for players just so I can be catered to.
Please add the option to disable it completely, like the Torchlight developers did here: http://forums.runicgames.com/viewtopic.php?f=9&t=686
Here's the wikipedia link for the condition the poster mentioned there:
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.