I love the sticker on air hand dryers below the picture of the hands that says push button receive bacon.

You should put them on the toilet paper dispensers.

Years ago there were stickers about the same size that just had a picture of a screw. The idea was to cover over the heart on peoples bumper stickers. Change something like I love my dog to I screw my dog, etc. Had some fun with those back then.

I like to lower the car window, when I am passing perfect strangers, lean out for a second or two, and call out. "Hey, long time no see, how you doin', really should catch up, but anyway I will see you this weekend. See you soon !" And drive off.

Sometimes I like to address small children who are obviously out with their mothers, give them my best cheesy grin, and say. "Wow! Are you having a lovely day out with Grandma' then. "