I have started hanging up FIRST, the second they say the word warranty or ask about my vehicle, I just hang up first, that's what they are going to do to you the minute you say no.
A spoofed number doesn't have to be generated from outside the USA! Scammers just Trying to get $$$$. Well you can't squeeze blood out of a turnip. Nope didn't fall off that turnip truck either!
Second call in ten days soliciting purchase of a warranty policy for 2007 car. Each time when I asked if they check the federal Do Not Call list, the guy hung up.
Same call for me, told woman that her 2 colleagues bothered me last week and she denied that they were her colleagues. Liar. Also told her I am on Do Not Call and I will report her, which I did. Not that it does anything but I felt better :)