Two questions here, and maybe someone licensed in Illinois can answer them:
1. When, in Illinois, did it become legally mandated that one had to be licensed to practice engineering? FYI, this happened in Washington in the late 60's, with most of the engineers I was working with at the time either taking the test, or being grandfathered in.
2. That being said, if it is really so important to him now, why did he not take the time to solve the problem simply, rather than grandstanding now? Personally, I do not know the individual or his reputation, have to question his judgment. If he had really been an "Engineer" as he states, he should have been aware of the engineering ethics laws with which we all must comply. It's not all technical competence that qualifies you for the licensing.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask