Bug#1009036: Use rel="nofollow" for links recognized in user messages
Please, consider adding the rel="nofollow" attribute to the links found
in the text of user messages. Such value tells search engines that the
link should not increase page rank of the target page. I hope, it will
make debbugs sites less attractive for spammers, at least for those of
them who try to promote some sites posting comments with links. The
approach with <a rel="nofollow" href="...">...</a> links is used by
various forum and blog engines.
Originally I asked administrators of debbugs.gnu.org concerning missed
of "reply" mailto: links on that instance and they said that it is
intentional change to avoid spam. I have no experience related to
struggling with mail spam, however I have seen recommendations for web
content to mark links in user comments as nofollow otherwise a site will
be attacked by spammers. I have realized that that there is no such
attribute on bugs.debian.org (or I was lucky to check only links to
white-listed domains) and I have seen some spam messages in various reports.