"Arguement is flawed" is still in the eyes of the poster. I certainly wouldn't just unthinkingly accept this sort of feedback, and the simple truth is that internet "sources" are rarely trustworthy beyond the writer opinion.
It is still a matter of trust. Approach me with respect and I'll consider your POF. Approach me with "Your reasoning process is flawed beyond your understanding" and really - who the heck are you? In the anonymity of the internet you could be anyone.
(Not that this is ever successful in places like Twitter.)