Not necessarily; only in the worst cases would a coworker actively harm you for not helping them once you've established that you can. I've worked with fairly

Not necessarily; only in the worst cases would a coworker actively harm you for not helping them once you've established that you can. I've worked with fairly immature people who can still be guided by my maturity. Of course, you're ultimately right. Some people just can't operate professionally, but I find those people to be rarer than they may initially appear. It's far more common to write someone off too early.