We were not immune as we lost about 20 units, but they were either owners with unreal expectations and/or underperforming units due to not being well located/renovated/lacking amenities etc. 

No reason to think real estate is immune. 

Orlando is not immune to storms, or Disney downturns etc. 

@Melissa Nash I agree that no class of property is immune from problems and it's best to have a portfolio of properties to offset the under performers.

Now when you are a master at SEO ahem.. and you ONLY care about bringing value to your traffic, and NEVER care about Google rankings... you are COMPLETELY and UTTERLY immune to any Google update what-so-ever.I have not touched my website in over 4 years, and I still dominate, and I still get free leads of the highest quality.So now.. ignore that person and keep on SEOing the crap out of your site!

Didnt follow any of the complex rules because they felt they were immune to eviction because the landlord takes kickbacks from them to keep his mouth shut.

California has specific mold laws - I suggest you read up on themCalifornia's "Toxic Mold Protection Act of 2001" authorizes the state's Department of Health Services (now called the Department of Health Care Services) to set permissible levels of indoor mold exposure for sensitive populations (like children, or people with compromised immune systems or respiratory problems).

-Is any area of the metro going to be immune to this, or can I expect this to get worse over time if its already happening within the core city? 

No body is immune from this junk. 

We target our rentals for families looking for their own space in a detached SFH, this has kept us mostly immune from MF rent influence.