Some of them are really hilarious!

funny

Yeah, I hate it when people go "invisible" and then you trip over then. Such a hazard! Funny Clip.

After reading that last sign, you want to say a four-letter word, but, of course, that's not allowed !

Had to look up "virescence" (last sign):

vi·res·cence (vī res′əns, vi-)

noun

1. the condition of becoming green
2. Bot. the turning green of petals or other parts that are not normally so, due to the abnormal presence of chlorophyll

So I guess it means "don't destroy plants" while you're "randoming" through the street!

Lol @ martron - thanks for the education, and also Lifestar, mugofcoffee,emsky, onlinedesign and others for clipping and stopping by...

My favorite sign of all is the warning and disclaimer of the Nelson Rocks Preserve. It's not funny per se but definitely worth reading.