So the difference is, Microsoft bought Mono, whereas Oracle sued their customers... Still not seeing how using .Net would open me up to a lawsuit, but any Oracle license might.
"Microsoft filed a lawsuit late Friday against an IP address, alleging that an individual or group of individuals has been using that IP address to illegally activate copies of Windows, Office, and other products without the proper license."
Microsoft suing Comcast for bruteforce-activating thousands of licenses, is not nearly the same as Oracle suing a customer because their definition of general computing is loosely defined.