After Luclin came out, my friend would go to the bazaar, so a search to see which PC vendors had a fungi, and then just whisper them. A successful exchange would go something like this:
Him: hey
Vendor: sup
Him: I started a new warrior alt
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Them: who's this?
Him: guess :P
Them: (begins guessing a bunch of friends)
Him: (picking one of the random friends) Ya it's me <friend name> haha anyways think I could borrow that fungi for a couple days? Just to get out of these low levels!
...and more often than not they would hand this complete stranger their fungi, he would transfer to another character and erase all existence of the toon he used to dupe them.
I successfully tried it once, but my conscious got the better of me and I found the guy a day or two later and returned his item back to him.