Marking, stamping, writting on US Currency?

Question

I know it's against the law to mark US currency, but some people still seem to do it. I am a registered user on WheresGeorge.com. I'm addicted to the web site, and I think it's interesting to find out where the money travels to. I know theres dollars out there marked with WheresGeorge.com on them.

This is my question. Do you think some people marking US currency will become more of a problem later in the future? Do you think some people marking US currency is a problem now?

Answer 1

Some people collect currency in all different denominations, marking them only eliminates their potential value. We should refrain from defacing all monies.