Is just adding the attribute rel="nofollow ugc" to any links in submitted content may be good enough. This tells search engines to not index, or tag them as sus

Is just adding the attribute rel="nofollow ugc" to any links in submitted content may be good enough. This tells search engines to not index, or tag them as suspicious, allowing them them to identify SEO spam more easily. [1] Having both options would be great. [1] https://support.google.com/webmasters/answer/96569 https://support.google.com/webmasters/answer/96569