The vm thing has been done, I'm sure people have youtubed it or whatever. They usually charge for the fix, often also install a bunch of actual malware too.
My own favourite responses are:
1 - panic. "Oh shit, I've just touched my computer. Have I caught it?"
2 - perv. "Could it be the porn sites I use? Some of them are disgusting, animals and everything. In fact, can you log into my computer now? I've got a site up as we speak and my trousers are around my ankles. It's really juicy. You'd enjoy it. Hello?"
I never thought to look on YouTube :(
There's just no way I could be bothered taking it so far! I have heard people enjoy putting their kids on the line to chat to any cold callers so I might try that, although maybe not as I guess the scammers could say naughty words.
They tried the same shit on my mum. While not super PC-savvy, she is suspicious enough and said her son takes care of all that. He wanted to know when the son would be home. She said he lives in Florida (brother), so not for some time. Then she said she had another son (me). He wanted to know when I'd be there, so she said she didn't know, give me the number and I'll have him call you. She's retired, so I have given her plenty of things to ask should he call back. She will enjoy jerking them around for five or ten minutes while she also enjoys a cup of tea. LOL
Fuckers.
Some of you guys are wicked. lol
And knowing might actually be more frightening than not. :-P