What further ideas should I do with this office I have acquired?
Set up an internet trolling school, using yourself as an example of what NOT to do. Your skills as an entertainer are as poor as your skills of lying.
"WOW this guy Jerry needs to go to anger management. And comprehension classes. Where did I mention "stealing power", now that would be illegal. What "authorities?? No authority is interested in my office, you should come down for a look Jerry. No one has occupied this office sine early 2000s Its mine now." Are you paying a monthly bill for electricity? If not, you are a thief. Are you paying rent for the office space you are using? If not, you are a thief. Unless you are using the space you are occupying legally, you are a thief.
Karma is paying you back for being a thief. You are stealing power that doesn't belong to you and squatting in a building that you don't have permission to be in. It's only a matter of time before the authorities catch up to you. Then you'll be staying in a place that's rent free to you as well as not having to pay for your meals either.
rent it out for meetings and the like