It is unlawful for any person, firm, partnership, limited liability company, association, or corporation to engage in the business or capacity of real estate broker in this state without first having obtained a license from the real estate commission.I think that answers your question.  

Or after I file unlawful detainer?

You discriminate against the wines that aren't a good fit.What you described, assuming Canadian laws are somewhat similar to US laws, appears however to be unlawful discrimination.

If you do not follow the terms of the “Notice to Pay Rent or Quit” we may then begin eviction proceedings against you and you will be charged with the crime of “Unlawful Detainer” if a judge upholds our claim.The amount of rent now due, as of today’s date _________________, is as follows:Current Month Late Fee _______________Current Month Rent _______________TOTAL DUE _______________

Third, your property insurance should have coverage for "unlawful sale" if you do end up on the wrong side of a judgement.

However, it is unlawful to discriminate against families with children, except in certain qualified housing developments intended specifically for older persons, which may be allowed to exclude children.For more information on Housing Discrimination,

CODE §30-2-50, OBTAINING OR USING PUBLIC RECORDS FOR COMMERCIAL SOLICITATION DIRECTED TO ANY PERSON IN THE STATE OF SOUTH CAROLINA IS UNLAWFUL, AND IS PUNISHABLE BY A FINE OF UP TO $500 AND IMPRISONMENT UP TO ONE YEAR, OR BOTH.The only paid lists we generate are through List Source.

It would be great if violated the constitution and we could sue the state or deem it unlawful?

If so, issue the appropriate notice to cure and if they don’t file an unlawful retainer against them for the boyfriend and his +1.

It is unlawful for any licensed real estate broker to retain, compensate, directly or indirectly, any person for performing any of the acts within the scope of this chapter who is not a licensed real estate broker, or a real estate salesperson licensed under the responsible broker retaining or compensating him or her, or to retain or compensate...