What I am saying is this is very crystal clear, you can trade ad nauseum in your TFSA:
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/tfsa-celi/txtn/menu-eng.html
There are specific situations where you can not, listed under the 'Prohibited Investment' section of the CRA TFSA link -- essentially arms length investments and you can't own more than 10% of a company + do a TFSA with the same company.
Otherwise it's open season.