RE:RE:RE:RE:Daily swings and your TFSA - OTHark...I think your last sentence is the important one.
CRA is not going to go after "Joe Blow" cause the cost of enforcement and the actual payoff in terms of additional tax revenue has to be worth their while.
In a TFSA, given how much money people can put into them even cumulative from the beginning, you would have to have significant outsized gains from active trading to capture attention from CRA. A very small and select group of people would fit into this category.
The average taxpayer/investor in a TFSA would have to be very unlucky to be audited by CRA in this regard. So I wouldn't lose any sleep over this.