In recent months, I've had to deal with a new shop hazard. It's about the size of a carbide tooth and just as shiny. Rather than sending a small piece of wood flying, though, it sends itself.
A table saw doesn't have a conscience, and will bite you if you treat it wrong. This shop hazard may or may not have a conscience, but is just plain mean. It'll poke you to see if you're paying attention, it'll walk all over you just to irritate, and very possibly enjoys doing it!
Irradication is proving difficult, as any attempts at irradication just shifts the problem to another location. Attempts to trap it at the other location are usually met with failure. Push sticks, sacrificial blocks, overblade guards are all effective at reducing table saw hazards, but nothing seems to work on this hazard.
If only I could just swat that fly.