I think there are many users not even knowing you can copy something with control c, and all that strange shortcuts, particularly on windows. These will not use alt c either, so there is no problem for them. "power-users" knowing the shortcut on other systems will probably find the control panel or the faq page about that without problems either... It's not like you have to find something deep inside regedit.exe to change it. So, I don't see where is the problem :)