Any aggregator of opinion is worth less than the sum of the parts. It will in theory show a slight skew as random behaviour is rarely even-handed, but that skew will be right as often as it's wrong.
OANDA provide extremely detailed information on the aggregate opinions of its clients in respect of their physical positions and limit levels in the market. There is often a definitive skew, but with less than 2% of those traders likely to be ending up profitable over the long haul it makes no sense to follow them. It doesn't even make sense to fade them as you're aggregating the various timeframes, methods, expectations and half-cocked calculations of the quite regally uninformed.