Privacy isn’t restricted to just your data on file. You’d expect some sort of privacy in bathrooms (I assume that’s where these would be installed). It can also set a precedent. Maybe they start tracking cellphone use “ensure students are paying attention”. Maybe they start tracking how often students are using the restroom, especially female students to gather data on their cycles (incredibly plausible depending on the state). Maybe they track their exact movements via school wifi. Maybe they give them laptops to spy on them at home. None of these obviously equate to one another but where does the school draw the line? Rather not have this shit in the first place.
The first one isn’t exactly watchable either. Beetlejuice is in it for 20 min of the whole movie? He’s not the main character, sure but you’d think the titular character would have more screen time.