Well, my business is registered with the Government, I collect PST, GST, and I pay Income tax on my Sales.
So I say bring it on!! I have nothing to hide.
Funny thing I sold an item to a Canadian a while ago, he emailed me complaining about having to pay the GST, while I explained that one day the US and Canadian Government would indeed be looking into the biggest underground economy in the world, for the people who did not collect and pay taxes owning the government, and that I would be ready for them.
Well I guess that time has come.
Also, I am sure that they will be looking at sellers who fraudulently collect the tax and then never report it to the government.