I've just read that defensive buildings aren't worth investing in.
What do they do for your stats at base level and then while upgraded?

What does it mean to camp in someone's hood? do people literally simply sit in your hood and wait for your buildings to churn out more cash?

As of late my laundromat has been getting robbed a lot. Especially since I've started upgrading. The only way I could see this being an effective strategy is if the robber is hoping I'll attempt revenge. Is that likely the case?