I once stole a fake flower from McDonalds
lolz
My Senior year in HS, my bestie had been dating this douchey guy. On Valentines Day he didn't give her anything or even acknowledge her. None of her friends spoke or made issue, but just let it be
That evening we went into McDonald's to grab some food. While sitting at our booth, another snarky chick we knew came up to speak. And to be NASTY, she pointed to the fact that the guy didn't buy my bestie anything and howww terrible it was. 
I could see the hurt on my friend's face.
So when we got ready to leave, I lagged behind as she emptied her trey and started outside. The booths at McDonald's had greenery and flower decor.
So I grabbed one of the fake roses and gave it to her when we got to the car.
She kept it clipped to her sunvisor for ages. She said it was her reminder to never sweat over an asshole again.