This is a common issue and it's because you're not filtering anyone out.

New lighting and faucets added throughout, all wood floors were stained in gun stock, and all interior walls were repainted with a darker gray in bedrooms and a lighter gray in common areas with a bright white trim.

A common recommendation is to research and background check the sponsors.

There is one common wall and that is shared 50/50.  

I have an apartment complex that seems to always have ants and spiders, so we spray the common areas every quarter to keep them under control and tenants are responsible for whatever's inside their units.

Disputing property tax assessments is very common.

The fees also cover the deck, pool, and common grounds.

It's a common enough thing in most homes and while I've never been to Cali I imagine it's even more so common with all the earthquakes I hear about!

Installation of cable or internet is simply common in every home in America.

Market fluctuations in the stock market take place every day and wild swings are common.