Layered Service Providers (LSP)

A lot of programs coming out now have server checks, some of them just checking reg info when you first enter it (such as SystemWorks and others) and some checking basically whenever you run the program (Thinstall, Easy CD-DA Extractor 7.x). Though these can be worked around or simply cracked, I was wondering about the possibility of using a LSP to reroute the outgoing connection to a local responder EXE/DLL/whatever which returns the "all clear" to the program.
It seems like in some cases that would be a much more elegant way to handle these requests. It would be more likely to cover multiple versions of the programs than most cracks.
Just tossing some thoughts around, maybe someone else here has already played around with the idea.