That's crazy. I have literally never heard of anyone actually doing that irl, only ever in the media (and then mostly English-speaking media at that). Half of them? Do they ever win those? Don't they need to pay for the company's lawyer costs if you can convincingly argue this claim is entirely baseless opportunism? Is there ever even a slight basis for this, any colleagues that treat them just a little bit less nicely or anything?
Edit: upon re-reading to add the citation I noticed the word "threat". Additional question: anyone ever follow through on that, or were the threats ever credible?