My reaction would be as follows: First I would find the ruins and think, "I wonder what's in here." Then, I would progress through the ruins as I would with any other ruin, but when I found the weapon room, I would think, "Okay, this is complete crap, I hate this." A couple of minutes later, I would end up using those guns and completely ignore swords, axes, and bows for the rest of the game.
Put shortly, it would detract from the overall gameplay precedent set by previous TES entries.