But this smiley face on a Singaporean street is different. This smiley face has landed the man holding it in court, potentially costing him thousands of dollars in fines.
And despite the risks, this smiley face has also inspired a wave of smiley faces in support.
So what exactly about this particular smiley face has upset authorities in one of the world's wealthiest and most advanced nations?
Why is this smiley face offensive?
Well, it has less to do with the smiley face, and more to do with the man holding it.