Well it made the point the end user(s) are liable. Just because your potatoes might be too small to attract a lawsuit, doesn't mean you're not criminally infringing, if Open Office does violate this same patent. Any reason it wouldn't?
OK. Point taken. However, OOo does not infringe. Check it out yourself. Here's the source code.
Even if you, personally, don't check it out, other people can, have, and will. OOo doesn'ty infringe. That's the strength and beauty of open source. It's all out in the open to prove there is no (intentional) infringing of anyone's IP. Once it's shown that some code may infringe ona patent somewhere, it's taken out immediately.