I wonder what future prospective employers think about his tendencies to publicly call out the company he works for? If eventually he quits his next job, what a

I wonder what future prospective employers think about his tendencies to publicly call out the company he works for? If eventually he quits his next job, what are the odds for him to be writing an inflammatory blog post about the company? It seems to me to not be a prudent strategy to bring politics into one's work (unless the job is political of course). On the other hand, maybe he finds a politically minded employer that way - maybe a leftist NGO or think tank? I frankly don't understand why such moves receive so much attention. People evaluate their employers or employment prospects all the time, and decide against jobs for a variety of reasons. What's the big deal?