It might be illegal, but not only from the stealing aspect. Most mall well have signs that tell you to keep away from the well(as a lawsuit protection measure I guess). I’m not sure what law it would be, but if they wanted to push it, I’d imagine something like tresspassing, or being a public nuisance, or vandalism could be thrown at you.
Have your girlfriend sit next to the fountain/well with a little sign that says “you can throw your money away there, or you can give it to me and I’ll put it to good use.”
How fancy! We had the same idea! I swear I wasn’t copying your post…although looking at the times they’re like 3 hours apart so it sure looks like I copied you…Anyhoo, if they’re good enough for you, they’re good enough for me (ya ya ya yayeeeyaaaa).