That can induce bad habits.
People look askance at resumes from successful Microsoft employees because to succeed in the last N years they had to do things that add no value to anything other than surviving or thriving at that dysfunctional company. Why hire such an person if there's a good chance he'll do some damage to your company while you attempt to deprogram him, during which he'll be much less productive that someone from a less damaged company.
(OK, finding the latter might actually be difficult....)
