Many rumors circulating that if you use equity to buy into a 2nd mortgage and the value of the second property drops as well as the first property value drops then the goverment can take both your properties even though you are meeting the mortgage payments on both homes.
As for the government taking property because of decreasing value, I fail to see how the government is involved in the purchase of any home other than to collect the taxes on it.
They've just underwritten all default CMHC Debts, and can act like the Banks, although that's highly doubtful. The Purpose of entire Exercise was to prevent People from losing their Homes.
I doubt however they will act any different than the Banks would in respect to any second Property.