I agree with above posters... I think it's a low price to pay, for a free firewall.
I voted NO anyway, because there is people out there just looking for a reason NOT to use or recommend a software, because of the smallest unimportant thing, like a registration. So i think that Comodo would get more customers without registration. Personally i would say yes...
Just remember the screeming voices about Launchpad... It sounded like it jumped out of their computer and put needles in their eyes

, after it forced them to push buttons and buy things they didn't want...

There will always be people like that...

-Switch to Linux!
-Buy a Mac!
-It's not free! They want my email!

and so on...