<oembed><type>rich</type><version>1.0</version><title>Matt Blaze wrote</title><author_name>Matt Blaze (npub1js…y93xu)</author_name><author_url>https://yabu.me/npub1jslger4ddlhwe50rluftrw4k9rjvvz4e9lutj29g45acyl78uwxsty93xu</author_url><provider_name>njump</provider_name><provider_url>https://yabu.me</provider_url><html>Periodic reminder that the Mastodon &#34;Private Mention&#34; mechanism is a dumpster fire of dangerously insecure and counterintuitive design. Among other things, it copies your message to anyone *mentioned in the body*, not merely listed at the start, as you might expect.&#xA;&#xA;You also can&#39;t fully turn it off (there&#39;s just a setting that merely silently ignores all incoming messages, with no failure indication to the sender).</html></oembed>