I wrote out a very long and detailed reply to someone, citing sources and putting quite some time into crafting my message, only to be presented with a message “replier blocked” in red font. Or if I attempt via a direct URL to the comment, I get a different presentation of the similar message saying “Your reply was not accepted because Replier blocked”, in black text against a pink background (in my dark mode view with PieFed theme, using Firefox on Android).