Originally Posted by
Soames
I don't understand, at all, how a bag of golf clubs, or a surfing board would be exempt

it really seems like discrimination to other pax.
Why shouldn't a seamstress be able to bring her sewing machine free of charge 
Not only sewing machines you know, here is a list of the sports equipment you can't take;
* hang gliders
* windsurfing boards and sails
* water skis exceeding maximum dimensions (H+W+L): 158cm (62in)
* surfboards
* kayaks, canoes and oars
* pole vaults
* javelins
* sewing machines