Craigslist Boarding Houses, Unfair competitive advantage overlooked? Please advise

[Mark Updegraff]

Hello All,
In my experience as a listing agent for rental apartments in a couple geographic areas, non owner-occupied landlords list out rooms to students and workers creating a shared living arrangement between several unrelated parties in a residence designated by zoning to be a single family home. I feel like it is an unfair competitive advantage against landlords that comply with zoning law. It seems very prevalent right now, and I'm just wondering if there is anything I can do eliminate the disadvantage. It was discussed in my local neighborhood meeting (where city reps were present), and they were going to "look into it" Who in the city would be good to engage in such an issue? Should I be doing the legwork and figuring out who the people are or is that the city's job?

Thanks!
Mark