Block all Spam bots using .htaccess

I only want to allow Google, MSN and Yahoo bot to crawl my site and block all others using .htacess
Setting rules on rbobots.txt file is useless because spammers break them.

 

what? How?


Anyways

found something that might help you out

http://www.javascriptkit.com/howto/htaccess13.shtml
http://www.askapache.com/htaccess/blocking-bad-bots-and-scrapers-with-htaccess.html

Code (markup):

 

Thanks, but that's not what I was looking for. Instead of blocking long list of bad bots, I only want to allow good bots(like google and msn)

 

more correctly they don't bother to check them. Why would they, they on a mission to spam anyways.

 

Excessive bots other than google seems useless to me