I think it's apparent that this line is to protect them from having to cover blades that have been sharpened in a way that damages or compromises the strength and integrity of the blade.
I had a customer experience with Microtech that was completely satisfactory, and I have sharpened the blade many times. I snagged my clip by my own error and bent it pretty badly. I couldn't remove it due to the proprietary screws. I emailed and was responded to within 24 hours explaining the return instructions. A couple weeks later, I got the knife back with a new clip. No complaints, and everything was withing a range that I consider timely.
The stolen 777 design was definitely a poor choice, but that story is more complicated than many portray. If you read Microtech's side of the story, they were insulted and provoked by someone from Kai first, and Microtech openly admits that they took the design and technology the knife had and manufactured it quicker than Kai could to prove that they could after Kai gloated about the 777 and claimed it to be beyond Microtech's manufacturing capabilities.
I have personal experience with this kind of rudeness and antagonistic behavior from one of Kai's ambassadors here at BF, in the past, as have many others. it doesn't sound that far fetched.
Regardless the entire exchange, if to believed, is petty and unethical, and I'm disappointed that Microtech and Kai (allegedly) behaved this way.
That said, the Microtech Socom Elite that I have in carbon fiber inlay is one of the best folders I have ever owned, both in design and fit/finish, and I will continue to love and carry it for the foreseeable future. I would be hesitant to buy from either company in the future, after all of this pettiness.
Source:
http://knifenews.com/microtech-responds-to-kershaw-natrix/