Well, not really an end, but basically I think I can present my case pretty well enough. Let me start by first explaining why I personally like to use the filter. First of all, they do not affect image quality....at all. For 99% of the people out there, they will not know the difference from a picture with a UV filter and one without. To prove this point, I decided to take some photos. I recently purchased the 50mm 1.8 lens and grabbed a clear UV filter from Ritz to put on the end. Look at these two pictures. Can you tell which one has the filter?
The picture on the top has the filter and the one below it does not. It's virtually impossible to tell this difference with the naked eye.
The other reason why I like to use the UV filter on all my lenses, is because it provides that extra layer of protection for the front lens element. I've heard so many horror stories of people dropping their lenses, only to have the front UV filter get damaged while the precious glass underneath remains unscathed. It's much cheaper to replace a 20 dollar UV filter than it is to replace a 1,000 dollar lens.
Don't be an idiot. Protect your glass.