Prop shaft flex plates on W123 failure exaggerated?

[lietuviai]

I was recently browsing parts on eBay and there was a seller who had prop shaft flex plates listed for W123's. In his listing he had written that if they should suddenly fail on you while driving that it can wipe out your transmission in the process. Is he just trying to exaggerate the failure to make you go out and buy a set? I have looked at the entire assembly and I don't really see how that could possibly happen. The way I see it is, that you'll get plenty of notice before they go to pieces on you.