The Internet gives a barrier of anonymity to engage in behaviors/things being said that would not fly in situations where people are in the same physical location.
It essentially serves as a safety glass barrier.
And lets not forget that alcohol seems to play a big part in cigar forums too. Couple the "loosening of the tongue" that booze can be responsible for along with this safety barrier of the internet and things will be said, or rather typed, that would normally not be.