I find (witnessed last night actually) since the other end of the line is connceted to a disconnect that is keeping it shut, when you take the tubing off the shank, it will not run out. I usually set a glass and sit the end in that if I have to work on the faucet, but only a few drops, if anything, will come out. Just disconnect the ball lock from the keg first, then remove the connector from the shank and you'll be fine. Even if it does all run out, it's just a few ounces in the line that you can catch in a cup.