whatever you guys decide, make sure 100% to end your session when you leave the computer - dont forget or else the next person who sits at the computer might see your VNC session open and play around with your machine. Games like "how many files can I delete in a short period of time" or "hunt for the purchase orders containing credit card info" or "upload sexy pics of your GF to youtube"
🙂 You get the idea. Anyway this applies only to a lab or school type environment. At work, you probably have your own computer which is dedicated to you so its not that big a deal.