I once worked with a fellow who worked long hours, including weekends, just of his own volition. Once, his management demanded that he come in and work on a Saturday. From that day forward, he only worked overtime when demanded by his management. Belligerent obedience. When asking for more pay, he was told "we pay average", so he replied "then I will give you average work". Belligerent obedience.
I'm not sure I'd suggest being that extreme, but you should consider why are you funding your employer's business operations by using your own equipment? Use their equipment, adhere to their policies and procedures. After all, I assume you are an employee, so you can only loose by trying to fight them. If it really bothers you, start looking for a better job.