[edit for grammar]
> Oracle has decided to weigh in because Lodsys “has repeatedly threatened numerous Oracle customers” such as Walgreens over the use of a web-chat feature Lodsys claims to own.
- http://gigaom.com/mobile/oracle-sues-to-smash-patent-troll-l...
Oracle cares about making money and protecting their revenue stream. Getting Lodsys of the backs of their customers is one way of doing that.
I don't understand why they need to sue anyone. Looking at their financials - they look like they are doing fine.
I always thought patents were meant for defence when you are making money, and attack when you are losing money (my observations - not fact).
Looking at Oracle's cash flow/balance sheet -> they are definitely succeeding.