Currently the tag excerpt for quantum-computer currently says:
For questions about existing real-life computers that run on a quantum architecture. This is for questions about the machines themselves, not just any computing that could take place on one. DO NOT use this tag for questions about simulation or emulation of quantum computers, or cloud-based quantum computing services like the IBM Q Experience.
However, around 50% of times I find that this tag is heavily misused by new users. Some even use this tag for questions purely based on quantum algorithms. I recently had to re-tag ~50 questions where this tag was misused. I'm wondering whether we should blacklist it altogether or perhaps rename it to something more descriptive. Ideas? Suggestions?
Update: Following @glS's suggestion I retagged the questions having quantum-computer with physical-realization, and made quantum-computer and physical-implementation synonyms of physical-realization. I feel that's a better option than activating a tag-warning, as many users tend to ignore tag-warnings. Also, @DaftWullie's point is very valid. Let me know if you have any objections.