I tried something like this with the Indian accents that call you up saying they are from Windows Techincal Services.

Of course its a well known scam attempt.

I strung them out saying that my computer was very slow to start up and they would have to wait about 15-20 minutes until it started up They did wait but not for 20minutes. I figured if I was causing them delay they were leaving someone else alone.

But doing this must have really peeved them. We started getting absolute floods of phone calls from them.

Sometimes at 3am in the morning. We had to trun our phones off overnight.

In the end we blocked all calls that come from a silent number and that stopped them.

So if you do something to peeve them then maybe you will get bulk spammed or something.

I think its best to ignore or simply hang up on them.