Phone Calls from the "IRS"

The last couple of weeks I have been getting "robocalls" from the "IRS" or the government. There have been some variations on each call as they're not the same. They basically say that this is my "final notice" to contact them regarding a federal lawsuit against me for some undefined legal matter or violations. It also states that if I choose to ignore this phone call that I will be arrested by the "cops" (their word, I swear). The call ends with a phone number that I need to call to settle this matter and the number changes each time as well.

This is a known scam. From what I've read online, if I call the number, someone (probably with a foreign accent) will curse and lambast me, stating that I owe a significant amount of fines that must be paid in that instant (via credit card or bank transfer). Failure to do so will have the federal authorities at my door within seconds to cart me off to prison. These @$$holes prey upon the elderly quite a bit with this scam, from what I've heard.

I am half-tempted to call them, put on a full-blown crying jag, complete with anxiety attack and begging fit, just to see what they'll do, to waste their time as they have annoyed me.

I'm actually surprised that Uncle Sam has not cracked down on these fools as they are presenting themselves as federal agents, which is against the law in itself, not to mention the extortion angle.