Is it that you morally disagree (I agree that it is a poor reward for doing me a service) or you have a disagreement about why society punishes whistleblowers?
It is a different story when coworker tells "boss" who is lazying around, and a different story when someone reports a serious misconduct towards other people. I'm not sure how to phrase it clearly, but generally I would not associate myself with former people, but I wouldn't mind the latter. Maybe one day they'd prevent me from doing something really terrible (given I wouldn't know better).
(In particular if you're in, say, finance, or a safety-critical industry, you are not going to want to hire someone who has a known track record of failing to report crimes. I mean, unless you're, like, FTX or someone.)