Ontario has made the decision that in the interest of public health, Police may stop citizens to determine their purpose of being outside their place of residence. Primarily the assumtion that the government is responsible for the health of an individual is wrong. Secondarily, This is a violation of several rights guaranteed by the Canadian Charter of Rights and Freedoms.
The purpose of having a police officer is making sure that our community is well protected and nobody try to harm each other. Intentially spreading a contagious and deadly virus is not ok and should be punished as an assault or crime. Police have every right to stop people who are not following the law.