Obviously you haven't looked, or even thought about it much. Yes, it is readable, and if you download the BearShare version it it even more so. The ranges are commercial rack space and the individual addresses are on dynamically allocated ranges.

Don't assume too much cleverness on the part of spammers. They are into this business because they are lazy. The vast majority of them still park their P2P nodes with their websites on their commercial accounts.

You also apparently think this list is static, and haven't noticed that I have been releasing the BearShare version frequently. This is just the first LimeWire release.

This list is much more than antispam protection. Blocking all possible commercial rack space effectively blocks all the giant bandwidth wasters that spoof the network with fake files and troll the network for other commercial purposes like marketing.

Also, let's not forget those waves of trojans and those massive fake farms that spread themselves out into dynamic address spaces too. Frequent updates tend to hold them back too, but if you want 100% protection uninstall LimeWire and you should be "safe". For the rest of us, having this list block over 95% of the parasites that burden the network actually improves our experience.

Anyway, I have been using this thing on BearShare constantly for over a year now and I don't see it blocking thousands upon thousands of legitimate users. In fact, I don't see it blocking any of them. Even though LimeWire cloaks most of the actual online activity, BearShare doesn't, and I see what happens to each and every source in realtime. Remember, the odds on the dynamic IP address of a spammer or hostile going to an innocent internet account are already low in most areas (few are so saturated), and the odds of one actually going to a legit P2P user on gnutella are roughly 1 in 2000 at the very worst. The fact that this list is updated every 1-2 weeks [from sources that are updated as frequently as daily] effectively rules out that minute possibility altogether because even the one or two individuals accidentally blocked won't be blocked long enough for even them to notice.