Permanently Deleted
I’m assuming the worst they could figure out is what station was used at what time to do whatever I do.
Make sure those workstations don’t have cameras nearby. Idk about the company you work for, but just because they don’t have someone on staff that can follow your actions doesn’t mean they’re not willing to hire someone if they think they’ve been legit hacked.
Trying to get them fired by sending things via their email will be tricky, since they can pretty plausibly claim they didn’t send it. IT can pull logs, and even if they can’t be used to identity you, they can demonstrate someone other than your boss sent the email. So, a mass email from their account won’t do much. Especially if it’s something out of character for them to send
Here’s an alternative: If you have access to their communication and can find something bigoted they sent in private, you can forward that message out to the whole department. It was a real email and records will show they sent it, even if foul play was involved in exposing it.
If you have access to their email you can search for dirt that can be leaked to press. Check their browsing history for porn, that sort of stuff. If you can get their company credit card, order a sex toy from their workstation sent to their home. Go through their email and look for phishing/hacking attempts and get their computer infected, let someone else do the hard work.
Just be careful. Is there no wifi you can get into to make things a bit harder to track?
How about you stop talking about committing cybercrime on a website likely monitered by the FBI?