They are not going to hold you down if you say no.

Why don't you want the line in? Just curious...... If it's a comfort thing, they are actually not that bad. A small plastic tube which would just have a little cap on it and be taped to your arm/hand. The sharp bit is removed and it is a tiny plastic tube that is left, so assuming it is taped down well it shouldn't get in your way. You can do anything you want and wouldn't be restricted by it.

If you really don't want one, then that is your right. They can't make you. x