DY
You cant really define “Improper Geirus” as like I said Satmar considered Chabad Geirus “Improper” and the example I gave all agree is impoper, but thats only because we heard of him, What if there are other Troppers out there.
And I belvie many Sephardic communuties dont even allow Geirus (Like Syrians?) so in those communities all Gerius is impoper.
If a Weiss Ger lived his life as a Frum Jew, Is it still “Improper”. If a Satmar Ger goes OTD (I know some who did) is that “Improper”