@mekkaokereke even at our sixth form centre (this is a college like the two senior years of high school) there are small bollards around the pedestrian crossing. Its not even as much against a malicious attack (although it would have been considered on the risk assessment) the driving age here is 17 so there's also a risk a nervous/new driver gets confused and may try to turn into the school across the pedestrian crossing rather than the correct pick up/drop off point..