Do you do anything other than hang up when you get a robocall?
Sometimes when I do answer a robocall I just ask them to hold on for a second while I get a pen and something to write on then I set the phone down and go back to work. They rarely stay on the line for more than 10 seconds and one Medicaid scammer calls often enough that he recognizes my voice and will tell me to fuck off and then hangs up immediately.