New IBM hire, software developer. So far; I've taken part of 3 separate events where I was essentially sat through a presentation on why I should file patents (so they could farm IP off of me and my peers). IBM is a pathological company, and definitely not good news for open source.
All software companies do this. They use patents like cold ware nukes: if you sue us over your patents, we'll sue over ours, and nobody wins. This is simply the inevitable result of western IP law.
> "OK," he said, "maybe you don't infringe these seven patents. But we have 10,000 U.S. patents. Do you really want us to go back to Armonk [IBM headquarters in New York] and find seven patents you do infringe? Or do you want to make this easy and just pay us $20 million?"