What do you say to your new-ish neighbor whose innocent daughter leaves things like this on your house?

Yes, the same daughter who has walked into your house uninvited multiple times, and asked why you're yelling. Or why your son made a mess in YOUR house.
The same daughter who runs around unsupervised all day, everyday.
The same daughter who yelled, "We're not home" as you knocked on their door for the 5th time that night.
The same daughter whose mom pretends to be on her phone EVERY time she is outside the same time as you.
The same daughter whose mom you uncomfortably saw in the car with her boyfriend...kissing.
The same daughter and mom who won't answer the door when you knock!
Tell me...what would you do?