I live in a hipster neighborhood, where snarking on sidewalk signs is an art form. This morning I saw the most Dope-appropriate sign ever outside a coffee shop, and I had to share:
Your Beautiful
Come inside and tell me about my grammar
Nitpick: Wouldn’t that be punctuation and spelling? 
Semantics. 
Sounds like you saw the joke, but not the meta-joke. Epic Fail for you, you less-than-sufficiently-hip person! 
What could I say about his grammar? I’ve never even met her.
You should go into the store and complain.
And capitalization. Unless the sign is specifically addressing someone named “Beautiful”. Someone should go in and discuss that, too.
DAMMIT. Pedant-sniping marketing.
That’s insidious. It’s hard to resist the siren OCD lure of telling them how wrong their sign is, and while I’m at it, get me a double espresso.
Bastards.
Had an advertising client (crusty old fart running an appliance store) that I learned a lot of Old School Tricks from. He’d always hang one sign upside-down in the window. So he got a lot of foot traffic-- people would come in to point it out (and he claimed that if they felt like they were smarter than he was, they might feel like they could get a bargain off him).