Disable image cleansing for public facing form uploads We want the public uploads to remain in raw state. Is it possible to disable image cleansing for entries created through public facing form? (Image cleansing to continue working for uploads through Control Panel.)
The imageDriver setting just determines which driver Craft should use when working with images (GD or ImageMagick) for things like image cleansing and image transforms. So changing its value will not affect whether images are cleansed on upload; just which driver would be used for that process.

If you want to disable image cleansing on the front end, you will need to write a plugin that handles the upload. You can find out how to do that from this answer: https://craftcms.stackexchange.com/a/9675/9