Ontario introduced laws prevent door to door sales of water heater rental contracts but that didn't stop this new homeowner being on the hook to Enercare for a rental contract without any maintenance totalling nearly $10,000! See this CBC news item.
The best defence you have against those annoying and pushy door to door sales people is to know your rights. Learn what you can do to protect yourself from unscrupulous sales tactics and what to do if you already signed up.
Eastern Ontario and Kemptville in particular has seen a large increase in aggressive sales tactics used by unscrupulous door to door sales people. The province is so concerned it is introducing new legislation.