Disallowing your SVN directories on your Apache webserver is easy.
moved to the archive as I don't use svn anymore.
Depending on how much access you have to your server there are two different options, a httpd.conf option and a .htaccess optoin. The global httpd is prefered as you will only need to do it once for all your sites.
Global httpd.conf file
# Disallow browsing of Subversion dirs
Order allow,deny Deny from all
RedirectMatch 404 /\\.svn(/|$)