You'd be amazed how many things you can do - physical things you do with your hands, like, say, turning a storage room into an office, a thing I actually did - if you just ignore people telling you you aren't allowed to. If you ask the question "what will happen if I ignore this policy", and the answer is not "I will get a pay cut" or "I will get fired," then the policy in question isn't actually a policy. It's just a suggestion.
Figuring your management's pain points is also very very helpful. I work in a building with metal walls and no windows. As a consequence we get no cell service in the building. We've been asking for cell repeaters for nearly fifteen years; we were always told "we can't do that, it's a personal service provided to employees, we can't pay for personal services."
Eventually the fire alarm went out - for 18 MONTHS. During a lab wide conference call I pointed out that in case of a fire there was no way to alert employees in the building. They said "we'll send cell phone alerts", and I replied that as they knew, because I had been telling them every year for fifteen years, there was no cell service in the building, and that this was a lawsuit waiting for the next building fire.
Guess what is being installed as we speak?