When I worked for Bell, they had just ended their WFH policy. I was required to be in the office every day. The rest of my team was still under the policy according to their contract, including my boss who was a 10 minute walk from the office, so they all worked from home. And most of my meetings involved teams in 3 different cities, not to mention the fact that it was Bell, so all meetings were over the phone with a screen sharing app. There were some other people that worked in the office, but they worked with different teams so I didn't interact with them beyond saying "hi" in the break room as I was getting coffee. But it was apparently very important that I be in the office.
Some days I really appreciate the fact that I left IT.
You can be offensive and funny at the same time. But it's an extremely fine line, and difficult to pull off. Watch Jimmy Carr if you want to see it done properly.
If you can, always set the title of whatever window you're working on to capital bold letters, preferably red, saying PRODUCTION SERVER - DON'T FUCK IT UP. This has saved my dumbass a few times when I looked up before hitting enter.