Average PC users should care about these things. And the problem is when my aunts computer slows to a crawl because of all the stuff she didn't know was being installed on there, and I have to fix it!

Changing my settings and adding menus without my consent is on par with entering my home and changing my thermostat, or painting my walls. You might think I need it warmer but I don't. IF YOU ASK BEFORE YOU MAKE THE CHANGE. Then that's ok, you have my concent. Otherwise, don't mess with my private property. I called my attorney general, and his office said that while there are no specific laws concerning this it could very easily fall under breaking and entering.