And exactly how would you do that? The line cutters would be walking...or running (like they usually do)...past YOU. LOL.LOL, like heck I'm going to take time out of my vacation to restrain some family that causes me another few seconds of waiting. If Disney can't be bothered to pay their employees to do it (when I'm paying Disney good money to do so), you better believe I won't be doing Disney's job for free.
However if annoyed enough I would gladly take my family and walk right past the line cutters and make a snide comment as I walked past them.