This is a good idea. Restricting avatars to the use of Gravatar means far fewer individuals will add their photo. UserVoice itself promotes the single sign-on concept, but the avatar feature requires one to get an additional account elsewhere (which involves researching whether or not the service is trustworthy, useful, fits one's needs, etc.)
Since photos are a way of contributing to the friendly nature of a community it can be argued that increasing the use of avatars through a more open system will increase the friendliness of communities harnessing UserVoice.
This is a good idea. Restricting avatars to the use of Gravatar means far fewer individuals will add their photo. UserVoice itself promotes the single sign-on concept, but the avatar feature requires one to get an additional account elsewhere (which involves researching whether or not the service is trustworthy, useful, fits one's needs, etc.)
Since photos are a way of contributing to the friendly nature of a community it can be argued that increasing the use of avatars through a more open system will increase the friendliness of communities harnessing UserVoice.