I know a lot of engineers at a lot of companies who look at porn on their work laptops (which isn't illegal). I don't know a single engineer who would take documents from their previous company to their new company (which is very illegal).
Not rare at all in the software industry, is very common. I'd say people are more split than OPs letting on, but plenty of software engineers are extremely serious about IP.
I know a lot of engineers at a lot of companies who look at porn on their work laptops (which isn't illegal). I don't know a single engineer who would take documents from their previous company to their new company (which is very illegal).