Do you have a source on that? I'm not a lawyer, but some of that sounds at odds with other case law I've seen.

It sounds particularly ludicrous to suggest that omitting a former employer from a resume is grounds for losing legal standing for some types of claims. For example, I worked at Radio Shack and The Princeton Review in high school, and don't list those on my resume since they aren't particularly relevant to the sort of work I do now.