Put it down to rank prejudice.
I see the "Fixord" thing as vandalism. Someone who lacks the whatever it takes to come up with something intelligent (or not) on their own should not be subjected to having their ideas vandalized.
You have a point, make your own point. You disagree, show your disagreement. But sail on your own bottom.
Back in the day - before the whiners came on board - it happened on occasion. We all knew why it happened, and who did it. Those who did it, thought they were funny, those who were on the arse-end of it thought the person was a dickhead, and those of us in the middle fell on either side. I see no difference to doing it than cussing at somebody.
Thing is, just brings in another unnecessary rule (and you can tell in the OP that Gunny put it in place reluctantly)...
It usually occurs 1) When somebody has been bested in an argument and they can't think of anything else - and therefore it makes them look stupid, and what is wrong with that?
2) Some people actually change certain words in a post and makes the post funny as hell.
And yes, it happened to me on a few occasions...and I didn't give a shit.....it's a messageboard, not the Senate...