Originally Posted by Broncos4tw
Meh, not really worth it imo. It's time better spent to simply properly protect your computer / servers / website / whatever you are doing. If properly protected, those IP ranges really won't matter.
And part of properly protecting your network is limiting IP ranges. At my job, I can't legally block countries out of hand. But you can be damn sure the only traffic I'm allowing from them is port 80 and 443.