Logging of time
A logbook is a legal document for the FAA but it is also a personal memoir of your flying. The regs say that you can not use certain types of piloting experience towards currency or a rating but it dose not prevent one from logging whatever they want.
Employers often have completely different standards from the FAA when evaluating someone as a potential employee. Some might accept Kingair part 135 SIC while others might not. How and what a person logs is a very personal matter. I have seen people completely falsify their records and others who neglected to log certain experiences that were legal by the FAA, because they though it was not good enough.
In the past falsification of flight times and creative logbook keeping was much more prevalent than it is today. Pilots today can get on to a regional with next to nothing anyway. There is little incentive to falsify. New hire times are so low that the bigger risk is from washing out of the simulator if you do not have basic skills.
In the end it is up to the individual. Logging of questionable flight time might just lead to the career of your dreams or disappointment in the interview. Neglecting to act on every opportunity however could lead to a very respectable career that goes no where. What the future holds and how your logbook will be received by future employers is anyones guess.
Life is risk.
Skyhigh