Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Want to ask the emergency services how many casualties they have of their employees when they have red & blue flashing lights and are hi-vis'd to the nines?

That only makes sense if you can get them to switch off the flashing lights and hi vis for a bit and see if they get more or less casualties as a result.

Just saying "you're taking casualties so your defenses must be bogus" is silly. It's like pointing out to the SAS that their soldiers are sometimes captured and killed while wearing camouflage, so clearly it doesn't work to hide them, they should stop bothering with it.