Don't let telemarketers ruin your day 3

I realize telemarketers for the most part are just doing their job, but it is really rather annoying to get these types of calls when you're eating dinner or just trying to sit back and relax, and a lot of times they come in pretty late in the evening.

I also have a hard time understanding why, when you clearly tell them you're not interested, they just keep going on and on and on....