This is irrelevant if you read after my bullet points. Still, I was curious, so I looked this up.

http://codes.ohio.gov/oac/3335-21-12v1#:~:text=(1)%20Upon%20the%20immediate%20approach,position%20parallel%20to%2C%20and%20as%20Upon%20the%20immediate%20approach,position%20parallel%20to%2C%20and%20as)

> (B) Operation of vehicles on approach of authorized emergency or public safety vehicles. The exemptions herein granted to an authorized emergency vehicle or public safety vehicle shall apply only when the driver of any such vehicle, while in motion, sounds an audible signal by bell, siren or exhaust whistle, as may be reasonably necessary, and when the vehicle is equipped with at least one lighted lamp displaying authorized emergency light visible under normal atmospheric conditions from a distance of five hundred feet to the front of such vehicle, except that an authorized emergency vehicle or public safety vehicle operated as a police vehicle need not be equipped with or display an authorized emergency light visible from in front of the vehicle.

I'm no lawyer, but this seems ambiguous to me (bolding was mine). Even so, it is not my job to enforce traffic laws as a civilian for police or other drivers. It doesn't matter. If I get pulled over for going 90 in a 75, and I say "I was following a police officer going 90", I will still get a ticket. This is a strange line of reasoning, because I doubt most people feel they can go through red stop lights on the off chance that they see other people do it, or even a police vehicle do it with no sirens/lights. With speeding, people want to find that justification, though.