L.S.T. and Fans?

When using the L.S.T. technique, should you have a fan blowing on the plants before you begin tying the main stem down? Or would this cause the main stem to be stronger and thus more brittle?

In my opinion...if you're going to LST it right off the bat, then fuck blowing the stem all around. If you've already had a fan on the plant, gradually bring her down.