Is "Impractical Jokers" real?

I love the show, but I saw some cameras in the background of some scenes. Some of the angle shots just seem "too real". Also, how does the sound pick up when they are out in public and why isn't there sound from people talking in the background? Why are some people's faces blurred if they don't know they're going to be on TV?

Bonus Question:

Do you like the show "Impractical Jokers"? Who is your favorite?