I know its part of the requirements to disclose your assets and liabilities, I did that in my application. A visa officer is trying to assess how you handle finances, a good debt is one thats backed up by an asset. For e.g, if you had mortgage, which is over and above what your showing for PoF, it's fine as you will be able to sell the house and pay the debt (provided you own equity in this home).
Anything like high interest debts are usually not appreciated by visa officers. They are literally trying to understand that you won't have to use your settlement funds for any reason, when you move to Canada. There's chance they may or may not find out about this debt, but not disclosing it opens room for risk of them finding out, if they had the ability to do credit checks outside of Canada.