I don't believe wanting to make money at something equates to greed for money, necessarily. You can pursue science for monetary gain, and no (reasonable) person will hold that against you. Scientists have to eat too, y'know?

That said, there is such a thing as going too far, and to sabotage the work of others, literally tamper with, damage, and/or destroy it, definitely crosses that line.

Well, not morally wrong or anything. But you can earn a lot more with the same effort elsewhere. For good science to result, you will usually have to be driven primarily by your passion for the research itself. ymmv