Agreed my friend but surely you must see how subjective 'joking' is? You 'joke' about cuckoos/adoptees = joke. I joke about your good self, Lookout and Lugg being old/ancient and that is deemed to be 'offensive' so much that it requires editing by Patti The Plod.
I'm not entirely sure why I'm even attempting to explain this, but here goes..
You are taking Maggie's comment completely out of context. If memory serves there was banter going on which involved naming birds. Maggie was in no way implying that she thought the term cuckoo was funny or acceptable when applied to adoptees, other than perhaps to laugh at those people stupid enough to use the term.
Your comment regarding the ages of Maggie, Lookout and Lugg served no other purpose than to be offensive. Agreed, it was probably mildly so, but offensive all the same. If it had been the first time you had said such a thing you may have got away with it, but I recall earlier comments in a discussion with lookout in which you attributed her views to her age.
You would do well to stick with the old adage "attack the post, not the poster", does that help?