Many of the new "safety" devices actually create additional hazard because they make it hard to operate the machine. As a case in point, my son has just bought his first lathe. It comes with a weird plastic cover thingy over the tool post area. This is the first time that I have come across such a stupid device. It is made difficult to fold it out of the way to change tools, you have to slide it sideways first. Guaranteed to raise tempers and frustration and hence increase danger.
I guess that it was thought up by some pratt in a H&S office who had never used a lathe. I am not sure what this thing is supposed to protect you from, tool posts are hardly actively dangerous?????