No, so far, and this is after two and a half years in my current set of campaigns (three, more or less).
I'm a little bit open to it, but I would need a lot of pushing. Most of my decisions are player-friendly, since unhappy players do not play the game. Thus, if they insisted, I would either buckle completely or admit the material after passing some kind of on-the-spot judgment or change.
But none of my players reads the mag, and I think it's fairly trashy, so it's not really an issue. I have enough trouble keeping "more official" content, e.g. Divine Metamagic, Orb of Force, etc., in check. I don't want to encourage the players to try to break the game.
1) Divine Metamagic gets the Incantrix rule, and 2) Orb of Force is as written but REALLY LOUD.