Google+ has some common sense content rules in the User Content and Conduct Policy [1] You'll notice there is no section on censorship based on viewpoint.
The issue described by Eric Raymond below is much more mundane. It's actually a problem in the way Google+ previews web snippets.
A couple of weeks ago we introduced the new Article embed type. You'll notice these posts by their distinctive large-photos with a ragged-edge. This new code caused the problem.
The markup on theblaze.com uses the markup. That, combined with some other factors causes the preview processing to fail. This issue was reported to us on April 1st and a fix will be released to production early next week.
I opened an issue on our developer site to track this issue since it does affect a handful of other sites that use the NewsArticle markup. Feel free to Star it to receive updates:
Originally shared by Eric Raymond
G+ may be engaging in non-viewpoint-neutral censorship of news articles relating to firearms.
This link:
results in post blocking when it's either pasted in the link box or pasted in text with the preview image not removed. Others have reported that all firearms-related articles from The Blaze, but not non-firearms-related articles, are blocked.
Something more specific than blocking of firearms-related images is going on, as the Geeks with Guns G+ community would have noticed that a lot sooner than now.
Google has some explaining to do.
Oh, wow. Thanks for taking the initiative to publicly communicate like this!
Yonatan Zunger, Apr 06 2014 on 1500wordmtu.com