My suggestion is to proxy your comments through a more powerful voice. One Monster Cable will hear loud and clear.

As a consumer wanting to be heard I'd write to Best Buy Inc. letting them know that one of their vendors is engaging in harrassment and that you are boycotting that companies products. Further, that by carrying their products you feel Best Buy is contributing to these actions and that you no longer feel comfortable patronizing their stores and feel obligated to tell others to shop elsewhere as well. Provide some links/contacts to competing companies that Best Buy can stock instead and suggest they should immediately pull Monster Cable products from all their locations.

If Best Buy says "boo" about this, you'd better believe Monster would listen. I'd be surprised if BB didn't account for a disproportionate amount of Monster's revenue.

Bruno