Interesting. Some magicians in the USA punch holes in coins to create "pen through quarter" props, which can be given away to spectators as souvenirs. Basically, the effect is that a coin is shown--with no hole--and a pen (or similar object) is visibly passed through it. A skillful performer can allow audience members to examine (or keep) the pen through coin. Not only will the spectator be baffled as to how a coin without a hole suddenly acquired a hole, the spectator will also be puzzled as to how a pen that seemed to pass so smoothly through the coin now seems to be stuck and unremovable from the coin. (Sorry, how those mysteries are accomplished are guarded secrets!)The two networks revealed how the coin tricks were completed last November, after a magician and a pub operator were arrested for punching holes in coins.
It is against the law to damage or melt coins in Japan.
I believe its also illegal to deface currency in england too.