That right there is reason enough to nip this cancer in the bud and get rid of these types of undesirables.

Whats nice is that there are NO balconies so people arent outside on the balcony talking loudly on their cell phones.

I ended my contract with AT&T cell phone and internet and uverse.

Dont let that cancer infect the other tenant.

He and I get to talking and we end up exchanging cell phone numbers.  

I mean after all, if you don't pay your cell phone bill on time, you get cut off or pay a fee, right?  

All my tenants have my personal cell.

Because I cannot single them out I had to do it everywhere so this costs me over $2,000.00 for equipment and installation.I talked with them again and I told them what my cameras have captured and gave them a 60 days notice to leave (breaking 12 months lease).I did talk to the local police department and I was told that unless I see them exchanging drugs for money there is nothing they can do and suggested I call them next time I see something happening so they can catch them in the act.The day I served them with the 60 days notice they told me that I cannot prevent them from doing their innocent internet business of selling cell phone batteries especially if it does not bother anyone.

Liability can then be limited to each "cell" and the owner of any cell is insulated from activities of other cells, state dependent.

Spray foam (open-celled) is your best option for the walls, if you don't have any.