Everyone has their own criteria for when they feel it's appropriate to assist their opponents, and that is in no way being frowned upon here. The 'accusation' that you were playing your opponent's cards didn't seem like it was intended to have a negative connotation as far as your own actions were concerned. Look at the other side of the equation: people are sometimes criticized for not assisting their opponents, the inference being that lack of good sportsmanship equates to bad sportsmanship. I wholly disagree with that notion. If you want to help your opponent that's your prerogative, and you can pat yourself on the back for being a good sport if you like. By the same token, I don't expect to be judged negatively because I let my opponents make mistakes. Sometimes making mistakes is the only way we learn, especially if the consequences are severe enough. So I think we can discount the good sportsmanship aspect of assisting your opponents, since you're really only hurting them in the long run.
The second major justification for assisting your opponent, besides being a good sport, is because it behooves you as a player to have the best match possible. I also take issue with this, and that's where our most recent argumentative tangent comes in. People say "I want to play my opponent at his best," but you really aren't playing your opponent at his best if he has assistance. You're playing him at his best along with your help. So maybe we can discount the only other major justification for assisting your opponent as well. That having being said, if not making mistakes is part of the skill in the game, and your opponent is using your skill to compensate for a lack of his own - whether that skill is solicited or not - then you are, in fact, playing both sides of the board.
Edited by WonderWAAAGH