That's what I hear can be done, but I've never been in that situation. I think my general response to a disagreeable rent increase would be to move out after living out my deposit. So far though I've had a good reason to move once a year or so (found a better place, could afford a better place etc.) so I haven't had to deal with rent increases.
I've been in my current apartment for over a year and even though my rent contract says there should be a rent increase of 10% per year, it is only a one year contract so I imagine it has expired, and no one has asked me for additional rent.