Google's Gary Illyes said this morning on Twitter that it makes sense to use the nofollow link attribute when you link to bad sites.
Sometimes when I cover stories here, I have to link to examples of really bad sites. Often, if the site is really bad, I will use the nofollow on those links.
Gary wrote:
Sometimes makes perfect sense to use nofollow.
— Gary Illyes ᕕ( ᐛ )ᕗ (@methode) January 20, 2017
Writing about a bad site? Don't help them with your reputation! Be like Fred, use nofollow! pic.twitter.com/ouHxj7HoVJ
Yea, he likes to dive - he has hobbies unlike some people.
So when linking out to bad sites, and your gut makes you feel bad about it, use the nofollow, it can help with indigestion.
Forum discussion at Twitter.