Hypothetical Leopard question

[Belmit]

Can they change their spots?

But seriously.

If, hypothetically, someone worked for a university in a job where they had been supplied with a Macbook Pro and a copy of Leopard, and had installed that copy of Leopard... what would be the repercussions of also installing that copy of Leopard on my... I mean their... own Macbook Pro given that no-one would ever know? Would it register that it had been installed twice?

I was on the brink of simply ordering a copy myself (mainly to get Boot Camp) then remembered we had a copy at work.

I mean this person did, in the oddly specific hypothetical situation I concocted.

Any thoughts?