Just trolling or asking for a serious response? This has been discussed at quite some length on several (numerous?) threads.
Quick substantive answer:
a. Yes, some "Pros" do [attempt to] hide their status in order to limit liability or being asked to babysit.
b. In the event of an incident which leads to a lawsuit, it is highly likely that such attempt to hide "professional status" will be ineffective due to the lawyer's due diligence in discovery -- that is, the lawyer should/will do a background check on anyone involved and discover the true level of training.
c. Anyone's level of "due care" [legaleze for how you are judged in responding in an incident] is related to one's training. An ER doc is held to a higher standard of "due care" when she helps at an accident scene than a "mere civilian" -- but maybe not as high a standard as a para-medic. In a scuba incident, a professional (DM/Instructor) will be held to a higher standard than a nubie OW diver just because of the differences in their training.
Note -- please feel free to agree or disagree with this analysis but PLEASE do not offer legal advice JUST BECAUSE you stayed in a Holiday Inn Express last night! And for the record, I stayed in a Comfort Inn last night but I did go to law school 35 years ago.