Would you wear one of these?

[Tortaruga]

http://www.copenhagenize.com/2009/10/australian-helmet-science-for-motorists.html

Would you prefer to look like this or be dead?

[Scottymon]

Daft, just wear a proper helmet if the situation calls for it... It only protects in 25% of crashes to the top of the head according to their diagram.