If a user becomes bothersome you may wish to block further contact with them. You may block a user in several different ways...

from right click on pal list
select the 'pals tab' on your 'pal list window'

scroll thru the list of your online and offline pals to find the nickname you wish to block

note: if the user is offline be sure to click the arrow beside 'offline pals' to expand the list

right click on a nickname in the list to select it

select 'block pal' on the menu that appears

from 'find pals' window
press 'find pals' button on the 'pal list window'

enter the nickname or email address you wish to search for into the text entry 'search' box

press the 'search' button in the 'find a pal' window

select the name you wish to block from list

press the 'block' button

see unblock pals