不一定要共用厕所, 房东房客共用厨房也行。这类房客不受安省租房法保护的。 房东给他们24小时书面通知请他们走人吧。过时不搬的话,你可以直接把他们东西扔大街上 (最好有目击证人和录像),然后换锁,如果他们还敢进来或破坏你的房产,你可以打911报警。
http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_06r17_e.htm#BK5
Exemptions from Act
5. This Act does not apply with respect to,
(i) living accommodation whose occupant or occupants are required to share a bathroom
or kitchen facility with the owner, the owner’s spouse, child or parent or the spouse’s child or parent, and where the owner, spouse, child or parent lives in the building in which the living accommodation is located;