Rita Skeeter came before Dumbledore borrowed the map, and Fred and George’s comments on the glitches were in a context where revealing them to be Rita Skeeter would have made sense (or at least, revealing it by now). It’s strongly implied that they just paid someone (my guess is Lockheart) to false-memory charm Skeeter. This points away from the same charmer being behind the Rita Skeeter prank and obliviating the twins’ memories of the map; the charmer in Rita Skeeter’s case is apparently ridiculously competent (one reason I suspect Lockheart), whereas the twins’ recent obliviation was fairly crude.
Here’s one possibility: Lockheart learned how to do tricky obliviation/false memory charm/leglimency from the twin’s plan. I mean, L have figured that out on their own?
Rita Skeeter came before Dumbledore borrowed the map, and Fred and George’s comments on the glitches were in a context where revealing them to be Rita Skeeter would have made sense (or at least, revealing it by now). It’s strongly implied that they just paid someone (my guess is Lockheart) to false-memory charm Skeeter. This points away from the same charmer being behind the Rita Skeeter prank and obliviating the twins’ memories of the map; the charmer in Rita Skeeter’s case is apparently ridiculously competent (one reason I suspect Lockheart), whereas the twins’ recent obliviation was fairly crude.
Here’s one possibility: Lockheart learned how to do tricky obliviation/false memory charm/leglimency from the twin’s plan. I mean, L have figured that out on their own?