What's wrong with cockroaches running out in groups in the community?

It is estimated that the property is sprayed with pesticides, and everyone is running for their lives, and the home is ruined:

1, Jie Bing cockroach killing gel bait (with security code) features: no odor, safety and environmental protection.

Methods: Squeeze a drug point every 10 cm.

Dosage: 50m2 belt 1 cleaner.

User feedback: The cockroaches that crawled in the house a few days ago are all dead now. I haven't seen them for several days. All I see now are dead cockroaches. Thank you.