Disable VCS Polling Follow

I setup a hook script to trigger my build because I didn't want tc constantly polling my svn server. However I see it still polls every 60 seconds looking for changes, it just doesn't trigger build.

It would be nice to be able to
1) Control polling on a per vcs root basis

2) If a trigger other than vcs polling is used, vcs polling should not be enabled. When the build is triggered, the server should then check vcs for changes.