When I quit Amazon, they ran to my desk and unplugged my dev machine, since they thought I was going to leave a software "time bomb". I thought that was the stupidest concern in the world, but maybe it does actually happen.
I never understood that “shut them out” reaction for people giving notice. Getting laid off, maybe. But I pick the time and place where I hand over my 2 weeks. I have all day or even a few days to do it, but I have known for a month or three that this was coming, I’ve known for days when it was likely to come, and I’ve known for hours or even days that it was happening today.
You don’t think if I was going to do something shitty that I would have done it first? You guys are really underestimating my intelligence, or at least my ability to plan. But then that’s probably part of why I’m leaving.
Also they say that liars think everyone else is lying, thieves think everyone else is stealing. So I wonder what this says about the paranoid person? Are they a danger to the company?
Another guy on the team intimated once in a while that he didn't like the team dynamics, but he played his cards pretty close to the chest. After he gave notice, on what we all thought was supposed to be his last day, we showed up in the morning just to find his computer and all of his equipment in a pile on a desk. We never did figure out if we or he were off by one or it was his middle finger to the team.
All the more mysterious because later that day we did discover his middle finger: The lead dev, who seemed to be one of the more reasonable people on the team, and the resident know-it-all both discovered that someone had fiddled with their configurations in ways that broke the system but produced obscure errors and hard to notice differences (like punctuation).
I took a couple lessons away from that project, and reinforced some that I'd already had. Perhaps the most important of which is: Bragging rights for being first mover are very, very short-lived. Once everyone else has copied it, the most accurate adjective for your version is 'old', or 'primitive', not 'first', and absolutely under no circumstances 'best'. Developers don't like bullshit. Don't pretend like your liabilities are assets.