Exactly.
Are opening traps bad?

If someone is dumb enough to fall into a trap, they deserve it.
The problem is in not structuring your play so as to set up a big trap which he may see and then you have a bad position.

Yeah, they are bad if you're in a bad position if your opponent doesn't fall for it.
If it gives you a good position anyway then it's fine, but those are rare.
As for there being no battle, that sounds great to me. A win is a win.

A win can never be bad as long as it's honest. You won that game because you outplayed your opponent & used your superior knowledge of that particular position - be proud of that !
Of course if you'd triggered the fire-alarm & moved the pieces around before your opponent had a chance to return to the board, then I'd have to say - "Well done for showing initiative"
But seriously, be interesting to see that trap - how about posting a diagram or even a list of moves ?

I am sorry to say that it's bad foropening traps. For other traps , I mean in the midle game and almost in end games its ok.Even your oppenent sees it and even if he avoids it and then still you are in no loss then it would be good one. You should force some one to fall for it( Many greatest GMs have fallen for such things), So force your opponents , then I would appreciate it Rt?... ;-)

Opening traps are part of chess.
A bad opening trap is one where there's a clear refutation. But there are MANY good and great opening traps. We can learn tactics by studying opening traps. Take a look at this game. a4 is an opening trap, and it's positionally sound!

Whether the play is creative or pedestrian, all wins come from a mistake made by an opponent.
Doshisha, was your quick win a checkmate, or did your opponent resign after seeing what would become checkmate, or did a resignation come too soon?
When I get ahead I want to find out if I can actually play the rest of the game well enough to get the win. When I'm behind I continue playing hoping the other player will make a large mistake, or I just try to see how long I can hold off final defeat.

Good one SmyslovFan (#9) - I havn't seen that trap before !
I agree with SmyslovFan. Traps are part of chess; they're simply part of the tactical justification for a move you want to play anyway.
For instance, in the first example in http://www.chess.com/forum/view/chess-openings/queens-gambit-declined-trap-1 , 4 ... Nbd7 is a good move. It allows you to re-take on f6 with a knight if white exchanges there, and preserves options for the bishop. While at first glance it might look as if it loses a pawn, a closer examination shows that you can indeed play this move.
But in SmyslovFan's second example, as he says, 4 ... Ne7? is a terrible move (4 ... d6 is recommended, leading to easy equality) because the knight has no reason to want to go to e7. The only reason to play it is because you're crossing your fingers and hoping your opponent is weak enough to play a move you've just prevented.
I wouldn't even dignify 4 ... Ne7? as a "trap" ... it's just a cheapo, equivalent to attacking a piece for no reason other than the hope your opponent won't notice it's attacked.
So in answer to the OP's question "Is it bad to win by an opening trap?", I would say it depends on the trap. If you played a good move and your opponent played a superficial move that you had just prevented - well, great! You played good moves and won!
If you played bad moves and your opponent played worse ones ... well, you were lucky and you should try to play better moves. So should we all!
Is it bad to win by an opening trap? I won against a much stronger opponent yesterday OTB with an opening trap that he missed, but I almost regret using it because it feels pointless. There was no battle. One minute, it was a completely normal position, the next minute, I had won. Just like that. I feel like I just gave up the opportunity to have played what could have been a really great game.