Yes, cutting it to get it off (vice, putting it ON) is probably the fastest...but as I can attest from rerouting my CO2 today from I/S to O/S my kegerator... either will work depending on the location. Cheers
Cut it off, then cut the 1/2" or so piece that remains lengthwise. Easy-peasy! 1/2" every now and then shouldn't cause a problem. You'll likely replace the tubing before those half inches add up to a significant loss of length. The problem is that vinyl tubing on a barbed fitting is kind of like Chinese handcuffs. When you pull, the tubing stretches length-wise, causing it to contract width-wise, tightening its grip on the barb.