ledenfrog, I looked for balanced discussions on stock MBs. When I see all moves up in a stock viewed as rational and righteous, and all moves down in a stock as manipulation, it's a problem.

Some folks would do well to read up on "confirmation bias" and especially "self serving bias".

Google "Investors’ 10 Most Common Behavioral Biases" for a start. I'd post a link but wouldn't want to get banned again.

Self-serving Bias: "....Self-serving bias pushes us to see the world such that the good stuff that happens is my doing...while the bad stuff is always someone else’s fault...."

(the "Planning Fallacy" is a good one to read up on as well)

And the highly recommended (by me) classic....

The Little Book of Behavioral Investing: How not to be your own worst enemy
Jan 26 2010
by James Montier