The Mathworks -- the folks behind Matlab -- sent out rather letters about a year ago on how they'd like to "remind" us not to violate their license agreements, and that the current license agreement includes provisions for them to come out and audit out usage any time they felt like it (!), and in generally we were probably second cousins to Shawn Fanning.
Our response was to spend awhile tracking down alternative packages to Matlab rather than purchasing another license or two as we'd been thinking about. ...although we still keep our maintenance current on the one copy we already had, since there are a lot of Matlab-only tools out there would be quite time consuming to have to recreate in another product.
---Joel