|laziness, impatience, and hubris|
Who stands to benefit? News agencies and advertisers. News gets reported, and any kind of suggestion of scandal or fear ("Perl is insecure, run!!!") gets readers. More readers bring higher advertising dollars.
We see the fallout on PM because the press created a situation where this story got a high public profile. It's in the forefront of many people's minds, who have many different agendas. At least some segment of those people will pimp themselves on a forum dedicated to discussing Perl.
I wouldn't read much more into it than human nature suggets. Who was it that said 'never attribute to malice that which can be adequately explained by ignorance' (or something like that)?
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The Code that can be seen is not the true Code
"In any sufficiently large group of people, most are idiots" - Kaa's Law