To add some perspective Yahoo has just entered the ranks of a Grade-A patent troll. That is the _worst_ of their offenses. That puts them in the same league as Intellectual Ventures. That's it. They're no worse.

Let's not lose sight of that. There's no real "news" here, apart from the sad realization that this is the strongest signal yet that Yahoo is now just an empty shell of suits, bean counters, and lawyers.