I am working for a large international company. I mostly sit by myself in my office. There is no registering of when employees leave and come. But do you think they monitor when I am logged into my computer? Is this normal practice? Is it legal for them to monitor my PC activity? I wrote a program that moves the mouse pointer randomly so I dont get logged out and can register more hours, do you think they will notice?
I use myself a selfmade program which does the same because I can't disable the screensaver on the laptop and I want it displaying documents while working with the desktop.
That program is not a problem. It is just a tool. My manager knows I use it. I always lock screens when I get away from computers.
What you do with it is what matters. And you are doing nothing. Your lack of productivity will be noticed.
It also leaves you in a very vulnerable and easily verifiable position. "How came Adam H shows as logged for the past 60 mins when I saw him leave an hour ago?" This is the worst position to place yourself from a legal point of view.
Also worth mentioning that you are leaving your computer open to be tampered with by anyone who passes by since your screen is not locked. That is certainly a breach of use policy for most companies.
Whether or not your company is monitoring your computer activity, a program that makes it appear that you are working when you aren't is highly unethical, especially if you are being paid for more hours. I'm not a lawyer, but I believe this would be considered fraud in most places. Even if it isn't, I can't imagine that your employer would react well if they found out about it, which they likely will.