Is it okay to refuse a laptop from a new university if you already have your own personal laptop? I got a postdoc position and I am moving to a new university. I was  contacted by my new professor about choosing a laptop that the department would buy for me.
The option they have is roughly the same model I have currently as my private machine, and the one that I have used to finish my grad school. Thus I find another laptop unnecessary, but also a hassle (having two computers means installing the same stuff twice, etc.).

My question: is it a bad idea to refuse their offer?

Additional information:


I don't have problems using my private computer for work, nor mixing personal and work stuff on the same machine. I did that during my graduate school.
But also I understand the pros of getting a work computer (e.g. if the laptop is broken or stolen it will get taken care of) and that my response of refusing their offer may be strange.
It surely matters where you are.

In the U.S., at many universities, "privileged information" of various sorts is supposedly not ever to be kept on "personal", as opposed to "institution-owned and maintained" machines. Or, as in some comments, as soon as you do have work-related data on your personal machine, that machine becomes liable to Freedom-of-Information warrants, and you yourself can get into various sorts of trouble for insufficiently guaranteeing security.

A similar issue exists (depending on jurisdiction, etc) with regard to email accounts. My (U.S. R1) university account is subject to search without too much probable cause. Some of my colleagues hesitate to have any substantive-sensitive discussion by email because the University's policy is that we are not to delete any such email, but preserve it indefinitely. That kind of thing. (No, it's not clear how this would be enforced, nor what the impact of "pleading ignorance/technical-incompetence" would result in. Maybe it's just CYA policy on the part of the institution.)