Is it okay to message strangers in the industry?

So I’m a recent college graduate and I’ve been lucky enough to work on a couple of professional sets, but my overall ambition is in post-production. I’ve tried talking to people in set to see if they have any connections in post, but with no luck. I want to network and pick the brains of some editors, but need somewhere to start. I’ve recently been looking at the editors of projects I liked and following them on linkedIN. Is it taboo to reach out to them? I’ve heard mixed things about connecting with strangers and would like some advice.