I have a website with multiple domains. I market a primary domain online and the others offline. My software tracks activity on the website to all domains. It allows me to track online and different offline advertising campaigns. Unfortunately, a couple of my other domains got indexed by google (dont' know how). I don't want to be smacked for spamming. I also don't want to just do a 301 redirect to my primary domain because I will lose the tracking to my other domains. So to get my other domains dumped from the index I want to present a 301 redirect to the big known spiders. My intentions are noble. I have a concern about the implementation however. Will giving a different command to spider than a browser penalize me in this case?