They do.

As the entire cafeteria proceeded to panic, and pandemonium ensued, Izuku began doing his best to **** his way through the crowd the moment he heard a couple cries of pain. He spotted Tooru on the ground, having been knocked over and currently being trampled in the chaos. She had even turned her body instead of just her clothes visible, having initially come to school in her usual invisible self as she worked to become more comfortable with literally showing her face, but the increased visibility didn't seem to help. Everyone was too panicked to notice her.

Izuku quickly **** his way to her and scooped her up, moving towards the windows so they'd only be crowded on one side. "You okay?" he asked as he managed to find enough room to set her back on her feet. She was shaking a bit, but nodded.

"A bit banged up, but I'll live..." she grimaced, even as they got pushed against the wall by another swell of the crowd. Iida, Momo and Ochaco managed to work their way over to the two, having gotten separated from Izuku in the chaos.

"What part of "orderly fashion" do they not understand!?" Iida groused.

"The part where fear based instincts override rationality," Momo replied. "They're too used to U.A's security, any Villains capable of and confident enough to breach the school are cause for concern!"

"...wait, guys, look out the window!" Ochaco yelped as she got shoved, and saw what was happening outside as she ended up facing out the window.

Izuku looked and paused as he took in the sight. The Media was outside, having somehow gotten on campus. "... it's not villains, it's just the Media!" he realized. He wasn't sure how they had gotten there, the barrier should have stopped them, but that was a query for later. Letting the crowd know so they could calm the hell down and stop trampling one another in their rush to get to safe rooms was the priority.

"Well, good luck letting these idiots know that!" Tooru huffed, clearly, and understandably, salty about getting knocked over and stepped on several times.

Izuku thought fast, and looked at Tooru. "Hey, Hagakure, do you think you could make the whole wall invisible?" he asked, already knowing she could, given his role in upgrading her Quirk.

"...maybe? I'll try," she replied, placing her hand on it. With a bit of focus, the wall shimmered, and faded from view, putting the whole scene outside on display.

The disappearing wall was enough to get most of the crowd's attention, and they looked towards it nervously, expecting a villain to be responsible as a further breach, but eventually, the sight of the Media outside registered in enough people that word started spreading, and the chaos calmed down as Tooru restored visibility to the wall.

As the din settled, Izuku shouted, "Everyone, it's okay, it's just the Media! I don't know how they got on campus, but no one is in any danger! Please follow the established procedures calmly!"

This managed to do the rest of what needed doing, and the students, no longer panicking, simply grumbled about the inconvenience as they filed out of the cafeteria and down the hallways. Izuku sighed in relief. "...remind me to file a request to Principal Nezu later to implement more drills so as to hopefully prevent this kind of reaction in the future," he remarked to Momo and Iida.

"I shall make a note of it," Momo smiled.