I agree with login only being a bit of a turn off. However, I'm not sure how to circumvent spam/harassment without logins. I'm also not too sure how to provide

I agree with login only being a bit of a turn off. However, I'm not sure how to circumvent spam/harassment without logins. I'm also not too sure how to provide someone with an account they can access and update continually without a login. Do you have any suggestions?