[walrus01]

To an even greater extent, ethics is a serious issue in network engineering as well. What happens when you're an employee of an ISP in Turkey and you're asked to MITM all port 53/DNS traffic? Or implement something like DNS lookup redirects to an advertising page? Censorship? The UK GCHQ and snooper's charter requires you to run a transparent http proxy and keep logs of every site every residential customer visits?

You work for a Thai ISP and the government orders you to block everything that insults the king and royal family?

You do network enginering for a mobile phone network operator in a developing African nation and they want to redesign parts of their network to support participation in the Facebook "free basics" walled garden internet for your GSM/UMTS/HSPA+/LTE type customers?

edit: there are a lot of things you can do to mess with a properly functioning internet, on the behalf of autocratic regimes or greedy corporations, just at OSI layers 2, 3 and 4... That's before you even get to the level of operating system and applications/software engineering.