A good debate :D
In certain situations it could be done.
Lets take an example, a jedi fights a powerful sith. Jedi gets overwhelmed, in order to defeat his opponent he uses offensive force powers.
The thing here is that the Jedi was desperate. And its okay to think that he used his power in fear of losing / in fear of losing his loved one / etc.
Ok there might be a possibility that the jedi did not use the powers with any emotion but that is the reason which takes him towards the dark side. Useing offensive force without any emotion/reason.
About lightsabers I don't know much. But its not aggressive or light ot dark or defensive force we use when fighting with a lightsaber. Its the same force. Windu's form needs much control of the force and he does so. The force used in all of the forms is the same.
Exactly, But I think fighting with a lightsaber and using offensive force powers is different. Meh! the force is complicated.
Oh,and welcome to the Forum.
Thank you! Have some Tatooine(sp) Ale on me