I suspect the data plate grabs were for sentimental reasons and that somebody took that initiative on the spot. It's not like those old phrogs are marketable one way or the other, whether the hypothetical customer is an entity who likes us or hates us.
If you have a large, flat blade screwdriver then you can pop the thing off in about ten seconds, though you'll bend and mangle it a little. If you have a drill and a ⅛" drill bit then you can remove one, cleanly, in about thirty seconds.
Removing the driveshafts, that was a pretty expedient way to disable them and their flying days are probably done for good. If somebody badly wants to see them flying again, and it would have to be for propaganda reasons, they're going to have to go to a lot of effort to procure a replacement part. The moment hasn't passed but the timing is fading fast for much propaganda value from the "evil American Saigon/Kabul evacuation helicopter in Taliban hands and gracing the skies, Allah be praised."
Where are they going to get a #1 driveshaft? Will some other country covertly supply the part and expertise all just to poke us in the eye? New part off the black market, custom made part, 3D printed part, some other origin? Who's going to install it? Maybe the same country that supplied it. Maybe one of the Afghan Air Force mechanics we trained, or maybe most of those guys have gone underground and are hiding. Anything is possible if we play "what if?" We left behind plenty of flyable aircraft but I'm not holding my breath on those phrogs.