"Then there are some who are accused of being trollers yet do not
agree. They argue that they are only having a discussion. They call
it "sarcasm" "irony" or witty banter. There are many versions of this
kind of person, they argue and cause an uproar and don't understand
the uproar they cause. Others may not have understood their intention
and both sides may have gotten a little too caught up in the
discussion. It is possible to try and help these people understand
the uproar they cause using e-mail. Sometimes the cause is hopeless."
http://www.cs.ruu.nl/wais/html/na-di...troll-faq.html