What's your opinion on dork discs?

This one is always divisive. Some people think they're ugly and useless, others think they're good to keep on to protect your spokes in the worst case scenario.

I just got back from the garage from cutting mine off (and unfortunately it wasn't a low quality/thin one so it took forever). I'm not against them per se but after about 1200km of riding, I noticed that it started to rattle and it was annoying me.

What do you guys/gals/pals think of them?