Our Obama sign got taken from in front of our house after 5 days. In 2004 our Kerry sign was also gone in less than a week. And in 2000 the Gore sign.
Both those elections, I read local articles about Democratic signs being taken (I haven’t read any this year but haven’t read the local paper recently either). In fact, one year they got a photo of a local Republican campaign worker loading someone’s sign into a van crammed full of them, which created a minor upset.
Meanwhile, all the McCain signs I have noticed have been up for weeks, and I haven’t noticed any disappearing.
No doubt there are Dopers that think it happens but do not know of any specific cases. I am curious whether any Dopers actually know of specific cases of Republican signs being stolen.