Hi guys,
Having first hand knowledge if the 'crash pad' case and the result, it is not as easy with regard to the issue of burdening owners for their tenants actions around parking on common property, however, you may want to have a look at including the lot owners in any particular by-law enforcement action with an action on the owner under s117 of the strata act.
Maybe one of the strata lawyers may be able to advise on this course of action?
Mr S