Others have suggested the possibility of software that would allow wearers to "undress" people they're looking at, in the manner of some airport body scanners.
However, Seattle's 5 Point Caf?, like many other bars and restaurants in the US, has ruled that any guest who insists on wearing a Google Glass while on the premises will simply be asked to leave - pronto.
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" The 5 Point is the first Seattle business to ban in advance Google Glasses. And ass-kickings will be encouraged for violators," reads a post by 5 Point Caf? on its Facebook page.
A Google spokesman said: "It is still very early days for Glass, and we expect that as with other new technologies - such as cell phones - behaviours and social norms will develop over time."