Wait until they learn that the Engineers also have access to a feature called "source code", which would allow them to do absolutely anything they wanted.
Or a thing called "the database" where they could modify tweets without anyone knowing.
Seriously, having a "god mode" is a common thing in software where you may need to impersonate a user to figure out exactly what is happening when that user does something and why it is breaking. It allows you to reproduce the problem the user is having to try and fix it.
Normally access to this "feature" is hard coded and only a very small subset of engineers have access to it, which it sounds like is the case here if they need to change the source code on production in order to access it.
I work at a pretty substantial company, much bigger than twitter (both the product and the company I guess you could say)
If I log into a production machine it sets off alarms to the security org and up my management chain.
Ditto for databases.
I have source code access but any commit that doesn't have a ship-it from other engineers is auto blocked.
You can skip that block but it sets off alarms to the security org and up my management chain.
Once I log in, every action is logged and the entire transcript is available and has to be review by my manager who then has to give his seal of approval.
Then it goes to my snr. manager, then my director, then the VP.
The approvals they give are legally binding so they actually ask you about everything you did on that transcript.
If any source code I have tries to access the internet or anything but other production system or production accounts with the same level of access control
Sets off alarms, everyone gets notified, etc. etc. etc.
I get background checks done on me every 6 months, my finger prints are taken every 6 months.
I need FIPS approved hardware.
TL;DR, nobody logs into these machines or does any of these actions unless we are in the middle of a large scale event.
Frankly I see our security as not strict enough, doing less than that is just inexcusable for a company like Twitter
It doesn't prevent you from taking those actions, it just makes it damn obvious to everyone that you did it and puts the onus on you to justify it; which btw. is easy for the right reasons