The city's sewer workers have their hands full dealing with cockroaches. There are millions of the creepy crawlers in the city and workers are doing what they can to keep them out of your neighborhood.
I will never understand why guys who do any type of pest control, dont cover their faces and arms when working with chemicals. I work in pest control and even when i am treating a basement i wear a small respirator or mask. These guys are trying to help the pubic while not thinking about themselves.
The best things to get rid of roaches, sugar mixed with baking soda, masking tape everywhere, jewel wasps, and evania appendigaster. I'm sure if all of those were used instead of paint it would do a much better job.