We love a funny sign as much as the next person, but sometimes they can make you wonder about the general public. We mean, if a sign is put in place, prohibiting something weird or explaining something obvious, it means that enough people must have done that weird thing or asked that obvious question to warrant creating a sign about it. And, frankly, that’s a little bit concerning! But, still, we don’t like to pass up the opportunity for a good laugh! So, here are thirteen funny signs that will make you worry about humanity. Take a look!