Frankly I think a bigger issue is the dangers inherent in having 2 pilots in a single pilot aircraft. There have been many incidents/accidents over the years where the guy in the right seat decided to "help" and did something unexpected or where both pilots thought the "other" guy was going to take care of/do something. If 2 pilots are flying together there should be a discussion by the PIC to the other pilot detailing what (if any) actions are expected of the other person in the airplane. There is a reason aircraft that require 2 crew to operate have detailed SOPs which define the duties of each pilot and those pilots receive training operating in a multi crew environment.