I see a bit of odd behaviour with Webmentions, Semantic Linkbacks and WordPress comments. There are five responses in this thread which started with a post from my blog that that was syndicated to micro.blog. Three of the responses show up under the original blog post. However, two show up under my Webmentions collection page.

I am not using the WordPress Webmention for Comments plugin.

It also seems that it's no longer possible to change the Webmention type via Semantic Linkbacks.

Update:

It's not odd behaviour after all.

Added limited support for accepting replies from external sites that do not have a Micro.blog account. Previously, Micro.blog would discard replies that could not be associated with an existing user. Now, these replies will be included in a thread using the domain name for the author. (Brid.gy replies from Twitter are not supported yet.) Manton Reece

The End of the Free Internet Is Near by Declan Mccullagh (Reason.com)

So far, at least, the U.S. government has yet to appoint a chief censor. But Silicon Valley's coastal elites have been eager to volunteer their services gratis.

The last year has marked a dispiriting new low in the "deplatforming," or banning from various online channels, of dissident voices. The ax fell on Infowars' Alex Jones, actor James Woods, the editorial director of AntiWar.com, the director of the Ron Paul Institute, and radio talk show host Jesse Kelly. (Some of these accounts have since been reinstated.)

Lawmakers have encouraged these social media bans. Congressional hearings have been called to interrogate tech execs on how their products are being used. Last August, Sen. Chris Murphy (D–Conn.) urged an even broader crackdown, proclaiming on Twitter that "the survival of our democracy depends on it."

Rep. Bennie Thompson (D–Miss.), chairman of the Homeland Security Committee, must have been listening. In March, Thompson sent a letter to Facebook, YouTube, Twitter, and Microsoft insisting that they remove "toxic and violent" content, even if it is legal to distribute in the United States. (The platforms already prohibit illegal content.) If the companies are "unwilling" to do so voluntarily, Thompson warned, Congress will "consider policies" to compel their cooperation. Left unexplained was how any such requirement could comply with the First Amendment.