To add to this as someone who has a friend that owns a publicly accessible fountain that needs the coins cleaned out of frequently.

He doesn’t care if a kid steals a handful of coins once in awhile. Most parents will tell their kids to put the coins back so that the person’s wishes still come true, but he doesn’t like when adults try and take coins out for any reason.

The coins are a not insignificant amount of money that helps pay for the cost of running the fountain and having adults fish out all the quarters does make the value of the coins significantly worse when it comes to cleaning time. Granted most people toss pennies to begin with.

Basically don’t dig out coins from a fountain unless you have permission from the owner of said fountain.