.htaccess code to block all the unwanted rebots?

Does any one have a .htaccess code list to block all the unwanted rebots, like ones that collect E-mail address???

Here's some code I use. It requires mod_rewrite:

RewriteEngine On
Options +FollowSymLinks

RewriteCond %{HTTP_USER_AGENT} Wget [OR]
RewriteCond %{HTTP_USER_AGENT} teleport [OR]
RewriteCond %{HTTP_USER_AGENT} go-ahead-got-it [OR]
RewriteCond %{HTTP_USER_AGENT} EmailSiphon [OR]
RewriteCond %{HTTP_USER_AGENT} EmailSiphon [OR]
RewriteCond %{HTTP_USER_AGENT} EmailWolf
RewriteRule ^.*$ /errors/badboy.html [L]