"Let's say that I post a negative comment directly after an early morning press release,then continue on the "non-issue" into trading hours,would you say that I was trying to undermine the value of the news or would you infer that i'm making an extremely valid point,of paramount importance?"
It depends on one's perspective. It is obvious to me that one's issue is not the other ones issue. The fact that it happened so early is not relevant, it just shows how some may care about the quality of any communication.
"If I post a comment around 9am or so,with negative overtures,would you think that I was trying to set the tone for the morning's trading?"
Please see my point above. Also, I would add that some are prompt in finding the positive aspects of any communication, hence the hypothetical positive influence, but some are also prompt to find the negative aspects of any communication, hence the hypothetical negative influence. Nor one or the other should influence one's decision, if one has done the DD required for a long or short term investment. One should be independent enough to balance things out to take a decision.
News 
Market Data 
Discover 
AI
