Is it illegal to answer a phone call with a deliberately wrong name?

Spam dell phone calls are way up. Fortunately, my carrier – T-Mobile – identifies incoming calls as “potential spam” or “potential scam”. Usually I ignore the calls.

Suppose I answer the spam calls as “XXX County Police” or “FBI Atlanta Office” or “Fraud Department” or similar.

Is that illegal?

(In my brief experimentation today – three scam calls – the caller immediately hangs up. So legal or not, it’s effective.

What’s the legality of my tactic?