Maybe suspicious was the wrong word...
Example:
Pilot A flies up to part 135 PIC minimums for $100 hamburgers and personal trips etc.. in his own airplane and then applies to a part 135 freight company for a PIC position.
Pilot B is a CFI and earned part 135 minimums and applies to the same company.
Pilot C flew jumpers and applies to the same company.
To me.. Pilot A might be looked at as the weak link because they didn't fly occupationally. Pilot A shouldn't be discounted because he didn't fly professionally; however, would that be the case?