Funny Green Aliens Did Not Do It Square Sticker

This sticker has a prohibitory traffic sign with a cartoonish flying saucer and a stylised pyramid on a white background, crossed by a red "forbidden" line. The sentence "aliens did not do it" in capital black letters runs all around the sign on a light green background. As an archaeologist, you probably had to deal at least once with a friend or relative asking you about the latest breaking scoop they heard. There is always someone wondering how ancient egyptian pyramids were built (no matter how many times you tried to explain)... and the obvious conclusion is that it must have been aliens. When they reach that conclusion, get into their house at night and plaster these stickers everywhere, just to get the point across. Or you know, you could simply put one behind your car and educate people stuck behind you in the traffic.