Are there even signatures here? Haven't seen anyone using a signature here just like in other forums. Although that's fine with me. Welcome mobilephone57!
Welcome to Android Central! The signature feature on the desktop forums was removed a few months ago because a number of people were including self-promotional links. The decision was made by the forum admins to remove the feature, although I believe it's still possible if you use the Tapatalk-based AC Forums app.