The thing is, addressing the spam and also allowing users to have a low friction experience would be the first step to addressing the concerns you mentioned (without compromising the purpose of the site: anonymous and totally free speech).
There aren't many places for the people that share the views you mentioned to go other than sites like 4chan, so even though there's an awful captcha, they're going to be quite dedicated as they don't have many mainstream options elsewhere.
I believe if users were able to have a frictionless experience, then it'd reduce the chances of someone throwing their hands up in the air and saying, "this isn't worth it". I've actually attempted to reply to threads to challenge the views of others, but once I'm hit with the 300-1000 second wait time to post, I just close the tab and move on.
There aren't many places for the people that share the views you mentioned to go other than sites like 4chan, so even though there's an awful captcha, they're going to be quite dedicated as they don't have many mainstream options elsewhere.
I believe if users were able to have a frictionless experience, then it'd reduce the chances of someone throwing their hands up in the air and saying, "this isn't worth it". I've actually attempted to reply to threads to challenge the views of others, but once I'm hit with the 300-1000 second wait time to post, I just close the tab and move on.