It can be used to harvest the user database. Sign up
for a free account and then tell your program to hit
/shared/community-member.tcl?user_id=1
/shared/community-member.tcl?user_id=2
/shared/community-member.tcl?user_id=3
It does not give the user any information they don't
have permission to receive but it will allow
retrieving the entire user database including deleted
users.