I doubt that they'd bother to 'harass' a scam-scammer. It'd just waste more of their time.

I agree that messing with these dorks (and dorkettes) can be time consuming but I'm retired, so no problem. Great fun.

Dingbatt: You don't need special skills. Really. Just fake extreme old age or imbecility. Or ramble in a made-up language.

Re abusing them, I went down that track when I first started getting their calls.

When one guy called, I said, 'Wow, it's noisy in your office. Are you on a busy road?'

'Uh, yes, very busy.' he said.

I replied, 'Then how about you go outside and throw yourself under a bus?'

'DUCK SHOE!' he screamed (or something like that) and hung up.