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 http://schema.org/NewsArticle 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:
https://code.google.com/p/google-plus-platform/issues/detail?id=805
[1] https://www.google.com/intl/en-US/+/policy/content.html
Originally shared by Eric Raymond
G+ may be engaging in non-viewpoint-neutral censorship of news articles relating to firearms.
This link:
http://www.theblaze.com/stories/2014/04/04/gun-control-advocates-who-say-more-guns-equal-more-crime-...
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.
