Some bits from me:
The IRS does NOT do emails or telephone messages, it's ALWAYS via US Mail. The notices are formal and non-threatening. They're not gonna come at you in the middle of the night.
Recently I got a "Paypal" email, I forget what it said, but even the subject line looked funny. It was a spoof or phishing or whatever fakes are called. The misspelled words and
grammatical errors were too obvious. If the subject line looks suspicious, you're not supposed to open the email; I took a chance.
If you get an email from a known company etc that you do business with, and it looks suspicious, if you're registered with that company, just log in and see if there's any messages for you.
Phone calls?? My phone is set for 6 rings before the voice mail picks up. Lot of time the usual whatever will hang up before the 6 rings are up. If I do not recognize the caller on the caller ID, I don't pick up. And I keep my phone on silent most of the time. It really is best NOT to talk to whoever, even if you know they're full of it and you just want to waste their time, best not to answer to begin with.
Open your door without seeing exactly who is there? No way. I know who's coming by and when. If I didn't call the power company or the phone provider, then you're not from the power company or the phone provider.
So, do you give your hard earned money to someone who doesn't even know your name? Ah ha, but what if they do know your name? Same simple rule applies. Don't give away your stuff to unknown persons.
It really seems simple on the surface, yet some people just fall for it. Every so often the news carries a story about so and so getting ripped. My reaction is always the same: How could you NOT have seen through this?
There's a fine line between paranoia and perception. I kinda like to employ both.