Spams via PM

[Faulty rectifier]

I haven't logged in for a while, so please accpet my apologies if this has been posted previously, but I was somewhat surprised to receieve a spam pm, trying to sell me viagra.

I receive enough of these via email without also getting pms on the matter. Is there anything the mods can do?
I've sent a pm to admin, should they want details of sender.

Faulty rectifier (unrepairable with Viagra)