I think that it is unethical for companies to try to lock down accessibility features like a "press-to-unlock" feature. From a utilitarian viewpoint it would not be ethical to gatekeep these features, as less people would be able to utilize the device that the feature is on; smart phones in this case. Closed-source software does not allow for the free development of technology, which is essential to the rapid betterment and development of mankind. Thus, I feel that all closed-source software is unethical. Ensuring profits for an individual does nothing for the betterment of mankind as a whole.