As of late, many IRCds, including bahamut, ratbox, hybrid, and UnrealIRCd, support CIDR based bans (AKILL/GLINE/etc). Not only does this feature decrease calculations when comparing a ban against a user's IP, it also decreases the amount of database comparisons and size. For example, a single /13 ban would require 8 bans in the current anope (if my memory serves correctly). Perhaps support should be added to anope. ... ?
