I do pretty much the same as AFM. I send out an email just before logging the "find", and I save a copy of the email. It is rare that I hear back from the owner. Back in August, I spent a day walking around the Mall in DC. Lots of virtuals there, and I picked up 20. I only heard back on maybe 5 or 6 of them.
"Wildness is a necessity." -- John Muir
"When you go to hide a geocache, think of the reason you are bringing people to that spot. If the only reason is for the geocache, then find a better spot." – briansnat