To me, a patent troll is a company that holds a patent and wields it aggressively without producing anything, and that's the way I've generally seen the term used. Clearly Apple doesn't fit this definition, as they are both making and selling tons of devices that use these patents.
In fact, there's nothing you can really say that indicates Apple is misusing patents. They are, unfortunately, using patents exactly the way patents are meant to be used. Patents are meant to stifle innovation in a direction that's already been taken. It's their purpose: exclusive rights for however many years in exchange for public disclosure. The only critique that I think can be made of Apple's use of patents at this point is that they're using them at all (which is a perfectly valid critique, mind you).