Messages
When sending my friends a payment, I always like to add a "special" message to make it a bit more personal. These messages are all sent in good fun with the recipients obviously being aware that it's just a joke (mainly aimed at any third parties who shouldn't be watching). An example would be, "This is the last payment. Please stop harassing me and my family. I can't take it any more. Push me any further and I'll have to take drastic measures."
I'm really just curious if those payment services do anything at some point.