It had to be said that a mob mentality indeed led to lower intelligence.
In a group, most people would give up on thinking deeper and just follow what other people did.
A small portion could still think for themselves, while most would still hesitate, and only a very few would react in a quick and logical way.
At that moment, the hundreds of people who had swarmed the first floor saw that the mall lights had basically gone out and instead were replaced with a lot of green lights. Only a few thought of 'safety first,' and slipped out.
After all, there were plenty of other shops in Gotham that they could enter tonight; there was no need to waste time in a strange place.
Not only that, many people shouted, "D*mn it, why aren't the lights on?"
"Somebody turn on the lights."
"Where's my new phone? Who stole my new phone?"
Nobody looked down on them for shouting like idiots. Most people were thinking the same thing.
