The people you're sending these tracking pixels to should be the final arbitrators. So are you willing to have them reply yes/no to a form that says: "Do you wish to transmit the time at which you opened this email to $marketing_company". If not, why not?
You broke the site guidelines repeatedly in this thread. We ban accounts that do that, regardless of how right you are or how wrong other people are or you feel they are. Would you mind reviewing the site guidelines and sticking to the rules when posting here?