Recently I was informed that a new user on this site needed 50 rep to comment, because of protection against-spammers.
My proposal is to change the error message that the new user gets. How about displaying an error message like
"50 rep needed due to protection against spammers"
"50 rep needed to comment. (due to anti-spam measures)"
Reasons for the need of this change:
It will prevent the new user getting irritated, and he will stop asking himself, why the site lets him answer, and not to comment.
I learned that it's very common in Meta that people come and complain about it. The change of error message will stop people coming here and complain about it.