This is certainly an interesting topic.
When getting unwanted phone calls my late husband would begin speaking with them and/or asking questions keeping them on the line for a VERY LONG time. he said they are paying for the call and I am going to make them pay.
When I get an unwanted call like for windows I tell them my house is new so don't need new windows.
An older fellow told a caller he was sure glad they called cause he was just foreclosed on and he needed their product. They hung up.
I agree there is nothing that is really free. we have a local thing in the summer for anyone from 0-18 years of age that can get a free noon meal. They ask for volunteers to help serve this so I volunteered one day to see what really went on. A bunch of teenagers came after their baseball practice. That really turned me off of this practice.
PLUS people say but it is free, a government program to use. There are NO FREE LUNCHES! Guess who the government is? Us of course.