Can’t they be blown up?

What if we just seal them inside somehow?

I assume if lit on fire using accelerants for long enough the people inside won’t be doing great.

I’m honestly less worried about a tank than I am about 1000 armed and unhinged gravy seals. I’d argue we’d need about 20:1 ratio for that. Maybe a 20:1 for a tank too, but I don’t foresee 1000 tanks logistically fitting in a small general area.