I returned home after a harrowing day at work and doctor's appointment to a recording on my answering machine of some woman informing me that the IRS is filing a lawsuit against me. She said to call back at the same number, but didn't give her name. I didn't call back because I don't have time for nor feel up to dealing with such foolishness. I managed a tired laugh, knowing it is a scam. There's no reason why the IRS would sue me. But, I did consider having the telephone number traced and contacting a lawyer to sue the scammer for harassment.
Good news for the scammers -- they won't need to worry about getting rich while in prison!
Won't work. The scammers are located in India and Pakistan and as such beyond the reach of US law. The local governments do little if anything to stop the scam. Invest in a call blocker.