I'd like to mention a change in this agenda. Agreed that language should not be forced (In fact Dr. U.R.Ananthamurthy uses 'voluntary' term). But, people coming from outside Karnataka should respect Karnataka & Kannada for what its giving back to us. For that matter, an Indian living in U.S should always respect that nation or land for what its giving back. If one feels a region is not giving back any favors, simply return back to ones native place instead of curbing & criticising others. Finally, the respect for the land that gives our daily bread (and much more) should come from our own hearts.
