And apparently, also when you think that ‘They’ is a perfectly serviceable gender-neutral singular pronoun, but are willing to use other pronouns if asked to.
EDIT: Other removable offenses on Blahaj now include questioning mod/admin decisions and quoting the modlog as a reason why you’re leaving.
I see using they/them as choosing not to engage with gender at all, so I cannot fathom a circumstance in which it would be misgendering to use such pronouns. If the argument against is that someone in refusing to address one by their preferred gender, I can see some merit in that position, but ultimately I believe one cannot force another to engage with them in terms of gender.
Now, if one were to intentionally use masculine pronouns to refer to someone who wishes to be addressed in feminine or nonbinary terms, of course that meets the definition of active misgendering. But I believe anyone has the right to simply refuse to interact with another with regards to gender by using common, nongendered pronouns respectfully.