Pfui - 9:36 pm on Jul 16, 2011 (gmt 0)
Wow. You're a sympathetic soul! And/or independently wealthy:)
After decades (yikes) of spotting abusive bots, I'm happily hard-nosed about any person or company 'practicing on' -- a.k.a. using and impacting -- my work, my visitors, my server, my bandwidth, my wallet.
If some bot-runner is either too ignorant or imperious to code for reading-and-heeding robots.txt, they can simply stay the heck away.
(Re your asterisk: I don't understand what you don't understand, sorry. A rewrite prob?)