Hi Sue,
Tags may be up to 64 characters in length.
Here are the basic rules we defined for tagging people and places:
For people tags - People may not add tags for other people, only for themselves.
For places tags - People may add tags for any place. People may add multiple tags for a place, but may only add the same tag for a place once. People may edit and delete the tags they have added for a place, but may not edit or delete the tags that other people have added for that place. Anyone can see the tags added for a place, but cannot tell who added the tags for that place.
We want people to take ownership of their tags. If I tag a restaurant, "crappyservice", the restaurant manager should not have the right to manipulate the tags that others have added, even if they are overly biased or even in some cases wrong.
- Ryan