Should it be allowed to wear Google Glass in public places where people may feel uncomfortable being filmed?

Google Glass is a wearable computer (glasses) with an optical head-mounted display (OHMD). It was developed by Google with the mission of producing a mass-market ubiquitous computer. Concerns have been raised by various sources regarding the intrusion of privacy, and the etiquette and ethics of using the device in public and recording people without their permission. More: en.wikipedia.org.