You chose this job. You know the rules. If you disagree with the rules, maybe it means that this employer work policies are not meant for you. You should search for an other job and quit. Otherwise, use your OWN laptop for personal stuff. Travel with 2 laptops, or a tablet, or whatever you use at home. Use your PERSONAL laptop for PERSONAL stuff (porn movies, bit torrent downloads, participating to DDOS attacks as an Anonymous peon, taking photos of your penis in the hotel room, etc.) and use your PROFESSIONAL laptop for PROFESSIONAL stuff ONLY.
What is hard to understand ?