Asking generally
Yes. It's not just bitcointalk.
Do you use a VPN service?
If that's so, that might be the reason why you have to solve tons of captchas every time you visit or login into a website.
Yes, I am using a VPN. I know VPN IPs have a bad reputation, because they are used for hacks and spam by some people, etc.
20 captchas? is this really possible?
It is possible when using a VPN, Tor, or if you're in a country with bad IP reputation like Nigeria or India.