From a rather more sensitive view, I would beg you not to. One of the (several) reasons for Technet subscriptions closing, was because, over the last year, of the proliferation of the sale of the evaluation keys on the web. As a long term user of such keys, I would hate to see something similar happen with MSDN keys.
Whilst it is a random chance, I would also warn you that MS do occasionally check activated products. Should they , in such checks, find one of your keys being used by an unauthorised person, you could well find yourself without a subscription, and no rebate.
Even in my environment, my large family, down to my grandchildren, understand this and have never asked me for the use of such keys.
The good news is that, although the keys are intended for "evaluation"only of products,you would be welcome to use theml. The condition will still apply, though, that feedback is required, either to those for whom you work,or, better, Microsoft.
Honest users should consider the MSDN terms of use very carefully, before they spend cash. This is a small extract:
"Many MSDN subscribers use a computer for mixed use—both design, development, testing, and demonstration of your programs (the use allowed under the MSDN subscription license) and some other use. Using the software in any other way, such as for doing email, playing games, or editing a document is another use and is not covered by the MSDN subscription license. When this happens, the underlying operating system must also be licensed normally by purchasing a regular copy of Windows such as the one that came with a new OEM PC."