1. It's not surprising that ffii claims the patents to be illegal, they're not exactly fans of the system. The implication that 30,000 mistakes somehow got through under the radar is naive at least: the EPO isn't simply granting patents by mistake. They have a large group of patent examiners who specialise in "computer-implemented inventions" (that's the euphemism they use for the dreaded softare patent), and their published guidelines specifically discuss what kinds of software patents are valid and what kinds are not.
2. It's even more far-fetched to believe that the companies who got these patents (i.e. the same ogres who apply for and enforce US patents) suddenly come over all shy about enforcing their European Patents. No sane company will spend 30k-100k to get a piece of paper in the idle hope that some day the law will change. Take a lowball estimate of 20k to get a European Patent, and that makes 6 billion spent so far on supposedly unenforceable patent rights, if your view is correct. That's not counting the annual renewals in each country (several thousand per annum per patent) or the tens of thousands of cases (and corresponding further billions of euro spent) for applications which were refused by the EPO because they actually were invalid.
3. But forget the hypotheticals. If you followed this area you would know that software patents are indeed enforced and enforceable in Europe, as long as they don't relate to business methods etc. Different countries take more or less liberal views of patentability (at present the UK courts are swinging back from a rather negative viewpoint), but in the long run, the EPO's practice on what is and what is not allowable tends to be followed by the courts across Europe. Businesses pay for and obtain software patents precisely so they can (and do) enforce them.