Most companies know which are some of the obviously dangerous questions to ask during a job interview. Are you planning to have children (i.e. many expensive parental leaves)? Do you have a happy (i.e. stable) marriage? Are you religious (i.e. a different religion than me)?
What about the less obvious questions? Focusing on any characteristic protected under the Ontario Human Rights Code (“Code”) is inviting trouble. If a job candidate can then establish that they did not get a job even in part because of discrimination, the employer may be facing a claim. The Code is crystal clear that the human rights regime applies throughout the entire employment relationship, from the interview and pre-employment stage, right through to termination.