Adsense and Evil Java

Adsense in general does a good job of targeting ads based on the content of your site.  I have adsense running on my blog and I find that it does a reasonable job of putting ads that are somehow connected to my content.  If I’m writing about Microsoft Project, the reader gets ads on Microsoft Project.

Adsense seems to have one basic problem – it cannot distinguish between positive and negative content.  Here is some content that I found on a random site:

Java is EVIL, it's the work of the devil, made to collect your
souls and to turn you into brainless slaves of hell.
If you like Java, you will lose your soul to be damned
for eternal torment in hell.Demons and devils will feast on your soul
for all eternity.
So stop using it now to save your soul.
Or the holy inquisition will come for you and burn your flesh to save
your soul, because the devil must not collect more souls or nobody can
prevent Armageddon.
Java is evil, using it is BLASPHEMY , only heretics and
witches like Java.And heretics and witches shall BURN !
Java = programming language written by SATAN in Hell's Kitchen in 666 minutes ! ! !

I of course didn’t write this and for the record, I have used Java for many many years and I don’t think I’m going to Hell.  I posted this to prove a point – Adsense will now show ads that promote java products.  This is a sample of what Adsense delivered on this site:

So the question is for advertisers – do you really want your company being linked to content such as this simply because it has a few key words in it?  Is there a way to heuristically analyze content to filter this out (or even better, target the negative content for example to anti-Java advertisers?)