I moved away from SysAdmin around 2010 and I worked with a fair amount of other techies and it really was the wild west in the stuff various people did with: sizeable production systems, Firewall rules (or lack of) network connectivity/ switches, and code changes

Get a cool tool from a magazine? yep just throw it on to production servers - no testing or letting people know what the hell they did (I got burnt a few times from people doing this!)

no change control, no documentation - just reverse the changes, if it doesn't work immediately - although some people never even made back ups of the previous files - crazy shit