I remember this one - there was a comment about "just get rid of the Lawful" - I thought that showed early alignment bias; some people equating Lawful with "not fun to play"Out on a limb: A letter expressing horror at Ed Greenwood's firearms article, saying it would destroy both the balance and the spirit of the game. Guns have no place in D&D. (oh noes)
This one gets a response from the author in a later issue.
And as I recall Gary comments later on the Firearms issue, and on the dragon armor article as well - with Gary echoing the letter writer saying firearms don't belong in D&D. I think one of the the best back and forth in the letters column were some responses to the big Psionics issue upcoming.