== Signing unsigned posts for others == 

 I do this a lot, myself. There are actually template for it: 

 Template:Unsigned and Template:Unsigned2. 

 I tend to write something like: 

 {{subst:unsigned2||Rainwarrior}} 

 This creates: —The preceding unsigned comment was added by   •    (UTC) 

 You can copy the needed information to fill it in right off the edit history. -