As much as I appreciate the thought when people come to help, if I have my full crew I'd much rather just have them stand by. My crew and I have docking down pretty pat and, with other people trying to help, it throws off the routine and causes more issues than it is worth. If I'm short-handed, I'll take help. However, I'll never throw them the bow line. Most of the time the unknown help will get the line attached to the mid-cleat. That way, they can't pull it in too tight and cause the stern to swing out from the dock!
"To reach the port of heaven, we must sail sometimes with the wind and sometimes against it - but we must sail, and not drift, nor lie at anchor.”
- Oliver Wendel Holmes