The most interesting thing for me will be that we be that the governement (and maybe us too) will be able to know much more precisely how much Airbnb renting is going on in the province and possibly where & when too.
If you consider following the law "government harassment", then your comment makes sense. But I'm pretty sure not declaring a commercial activity is illegal and not declaring revenue from that activity is called tax evasion, Airbnb or not.
I actually do bother to look that stuff up each year, but I suspect that many Canadians do not if they don't receive a form.
There is a provision where everything under 30kCAD/y isn't fully taxable. After 30k, you have to pay the taxes fully (including on the first 30k). So while there is some income taxes, the full VAT taxation isn't enforced (you can pay if you want, "of course"). So smaller hosts still have better margins than the bigger ones.