3) Your opponents' habits of playing a large spectrum of hands at whim is not necessarily bad for them! Sometimes it can be closely in tune with game theory and can cause them to "randomize" their decisions effectively.

4) When you try to analyse poker strategy, you need to realize that you simply can't say how most opponents would play a hand or--in many cases--if they would have played a hand. They often don't know this themselves until the very last second!