Okay...
A
TROLL is a jerk from
another forum that logs on here with the sole intent to cause trouble
An
AE is typically a jerk/coward from this forum that creates an Alter Ego to log on as so that he can cause trouble but people won't know its him (or her). As I understand it many of the AE's on this forum can be traced to a single IP address. 
OBTW, I know who the owner of the Connie_Chung AE is. Thats why I say "typically" above. From what I understand this AE's owner is a pretty good person.