Does YCombinator have to use Google for captcha?

I access Hacker News via Tor Browser, and while I understand the need to protect against spam, I wish I didn't have to allow Google javascript. What are your thoughts on this? Is there any way to avoid using Google for this? Also, just throwing my experience out there, but in order to access this submission form, even after enabling Google scripts, I had to complete 6 correctly filled captcha codes. I know they were correct because all of them were clear address numbers of lengths 3 or 4.