This seems an absurd claim, unless you're going to get very pedantic about some distinction between "engineer title" and "legal right to function as an engineer".

> https://montreal.ctvnews.ca/engineer-s-licence-revoked-after...

This is one example found after just a few seconds of searching, but it is absolutely commonplace to have your engineering license revoked for carrying out criminal activity.

> In those jurisdiction where it's a protected title, it just implies that you have some mix of STEM topics in your degree.

This seems a bizarre claim too. In jurisdictions where membership of a professional licensing body is necessary in order to refer to oneself as an engineer and practice as an engineer, it is absolutely not the case that all you need is the right "mix of STEM topics in your degree". It means you have a certain degree, have completed a set amount of work experience, have completed a professional certification exam and then maintain that license, which may require meeting other requirements periodically. And yes, "not being a crook" is certainly one of those requirements, and being involved in major criminal activity, especially criminal activity related to your professional practice, is absolutely grounds for having your license and certification as an engineer revoked.