Lately, I've become very interested in flawed security systems. There are measures in place to protect children or employees or air travelers that are well intentioned but just completely unworkable. But unlike most unworkable products, they persist anyway. I think it's a testament to the intention being more important than the relatively smaller threat of whatever danger they're supposed to present. There's the classic "small amount of liquid" at the airport thing, of course, but I've noticed several equally dunderheaded measures in day to day life.
1. During this family leave, I've been volunteering a bit at my son's school. When I go in, I am supposed to go to the office, which is kind of tucked away, in order to sign in. Nothing makes me do this, I just know that that's what's done. Once there, I sign my name (illegibly like all others) and write down why I'm there. Then I write my name on a sticker, affix it to my shirt and walk away. No one checks ID, no one makes eye contact. I could sign nothing and make up a reason ("Amway sales", "fistfight") and write THREAT on the sticker. It would not make a difference. The system is in place today.
2. At another school I'm familiar with, parents are asked to sign their children out when picking them up at the end of the day. But there's often a big line around the single notebook used for this purpose and so most parents don't bother. Those that do might wonder why they bother. The system is in place today, as far as I know.
3. When I worked at Amazon in the late 90s, the company did not yet have real security badges (too busy taking over the world and hiring me for jobs I was unqualified to do). So they gave us pieces of construction paper with our names on it. We were expected to hold these up to poorly paid inattentive security guards as we walked past. Sometimes, often, the guards would be across the lobby and would yell, "Can I see your badge?" and we'd hold them up even though nothing could be checked or verified. We could be holding up any piece of blue paper in the world. This system is not in place today but it was in place at one time.
There are creeps and bad parents who have been denied custody but try to get it anyway and corporate spies and disgruntled employees in the world. And they must be stopped. But there are a thousand really stupid security systems in place that actually make things worse and make it harder to stop bad folks because they fool people who should be in control of the situation into thinking that security is under control when it is absolutely not.