“Why, then, has there been strong opposition *within Lubavitch* to the appellation “shlita” upon the Lubavitcher Rebbe zt”l?”
I was told because they are worried about those that say “Na’aseh Adom” – a proof of shtey reshuyos, these same people will also shilta means…as we see indeed there are such people that have such ta’anos. But others hold, “ha’rotzeh litos – yiteh” (those who with to mistaken – let them), as Rashi says in chumash).