Also, don’t be that engineer that tells all the other departments what they’re doing wrong, having done a couple of Udemy courses.
But you do have those empire-building types who see everyone as trying to encroach on their turf. If you run into too many of those, I'd honestly suggesting looking for a new job - companies where a lot of people have that kind of attitude tend to be both not great to work at and also less than successful in the long run.
This also goes both ways. I also offer to help people to learn more about my side of the organization, going as far as being a mentor. A former coworker, with whom I am still friends with today, I met at a previous role where she was in marketing but wanted to know more about the development side, having had no prior experience. I was able to get her started in software engineering. Fast forward 6 years, she’s now the lead automations engineer for a marketing company.
On the other hand if you come off as genuinely interested in what other people are doing with no ulterior motives, 95% of the time you'll get warm feedback. I think you'd be hard pressed to find someone that'd react confrontationally to a middle schooler asking about their job. Why? Because their intentions are innocent.
This is way too little information to be meaningful.
Was he walking around talking to people in different departments about what they need, was he stealing paper from people's desks at night time when wandering around the building. Who knows.
One group was even bewildered I was able to integrate a department client app with their ticket database. Reduced necessary clicks by 95% or so. They didn't think it was possible. Yes, this is the caliber of folks working at a big corporation.
Unless you are one of the few people experienced with back-country trekking in active geothermal areas, stick to the roads and trails.
If you are unfortunate enough to be stranded in yellowstone, follow fresh game trails. They will be less likely to lead through boiling mud. On the other hand, the wildlife is unpredictable due to the massive population of stupid tourists.
Yellowstone is dangerous. Stay on the trails and roads unless you know what you are doing. And you probably don't know what you are doing.
Perhaps that is the problem (at least with some sectors: a close friend's partner's daughter has worked as a civil engineer with a couple of employers for a couple or three decades now - she can show you the roads she planned and managed the building of)?
I've gotten in trouble before while exploring and then being accused of putting my nose where it shouldn't be. It can look like you're wasting your time looking for distractions, or trying to dig up dirt. Not everyone in all parts of your company is going to like you poking around. You also risk picking up new responsibilities if people catch wind that you might be offering help. This can be the start to a promotion and also a good way to just make your days longer for no additional compensation. Not all managers will respond to the leverage of cross department work you took on yourself, though they probably should.
That said, if you do it well, which is an art of it's own. I agree, the potential benefits outweigh the risks.