I totally agree 110158.
Here is comment from Peter Schiff from his blog Schiff Knows Best.
--> To use it on one end of a trade between the same house. For example RBC buying, and RBC selling, but disguising the sell as anonymous. This can artificially push a stock higher or lower but the net change to the broker/house is zero. This disguises who is on the selling end.
So much for transparency on the Canadian exchanges aye!