We went during marathon week last year in January and were never once affected. We did avoid Epcot the day of races. We didn't know it was marathon week until we got to airport and someone asked if we were running. We are going back this year and running in the 5 k.
I guess if you can't think of a real reason to sue, theft of services is a good one to throw out there.
I have to say one thing, Disney knows how to make money. Do you get anything for the $190?