On the net, things should always be taken with a pinch of salt. However perhaps due to the encounters some people have with net friends or chat mates, they may believe that there are some people who will reveal their personal things truthfully albeit it is not very believeable.
For e.g. it may seem unbelieveable that there are girls who can readily agree to one night stands with their irc desperado guy friends, but the reality is that such things do happen.Some buayas will just be fishing around online and hit jackpot or similarly it can be a case of the girls aka buayees fishing around for something.
Alternatively, some people just love to take things too seriously or purposely want to find someone/something to flame even though they know that things are meant to be taken as a joke.
To a certain extent, the cyberworld is a place for people to do whatever they like and wish with a degree of anonymity which probably explains why somethings we can see some people allowing their more dark side surface. Or course there will be some genuine cases of looking for help and advice or friends on the net as well. It is hard to determine who is telling the truth or just having some fun around and the best bet is to get to know the person better and use own judgement (which can of couse be wrong also)