They have called several times, always missed their call, so unable to figure out what company is calling (web searches show nothing). Called back (as KBD post didn't say they were abusive, and was polite to them), got message "The person you are trying to reach is not accepting calls at this time." Thought I could be taken off their list. Nope. Blocked them.
They call me a couple times a month. They hang up when I answer. Do people really have no purpose in this life? Do they actually make a living doing stupid meaningless things? Wow............