Are there any very lopsided scores in openings at lower levels? I was reading this question: How to know how good an opening defense scores, and it got me wondering...Have there been very lopsided opening scores in the lower levels. For example, if we found out that the Halloween Gambit: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 scores 90% in under 1800 level category it would be quite an anomaly. 

Edit:

One kind of an anomaly that I can think of at the top-level is the Traxler:

    [FEN ""]
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4. Ng5 Bc5


According to chessgames database black scored 60.1 % wins and 15.9 % draws in 308 games. Of course we don't know relative strength of the players, maybe stronger players had black pieces.

Edit:

Tony Ennis pointed out that according to 365chess.com there is no advantage for black in the Traxler.
In order to answer your question, I put together a database archive of 30000+ games played in over-the-board tournaments where both players were rated less than 2000.  Only one game had the Halloween, and there were few Traxlers.  Black died quickly in a handful of Fried Liver Attacks.  There were no Parhams 1.e4 e5 2.Qh5 nor Fool's mates.

The Triangle/Noteboom complex scored very well for Black as did the Benko Gambit.  1.d4 d5 2.Nc3?! looked to be a bust, and the Sicilian Grand Prix Attack 1.e4 c5 2.f4?! didn't fare well for White.  In the Ruy Lopez, the Steinitz defence 3...d6?! and Cozio 3...Nge7?! led to a lot of Black losses.  Rubinstein's line in the French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4?! didn't do well either.  A lot of patzers fell for 1.d4 Nf6 2.c4 d5?! 3.cxd5! and ended up getting overrun.  1.e4 c6 2.c4! did well against the Caro-Kann.