I think the Star Wars prequels offend me more than about any other movie I have ever seen. I symapthize you Ingo, sometimes when I see the prequels (or even recollect them), especially episode II and III, I become so offended that I too become crippled and cease to function properly. Other thing that offend me are:
Silly obsessive fanboys who worship the PT
Trolls
Over use of CG in movies
Overly violent first-person shooters
there are many other things, but thinking of things that offend me to write this list has offended me greatly and I can barely function enough to type at the moment.