:) Since a part of my job is to recognize fake docs I dare say that there`re easier ways to steal identity than digging in the dumpsters (also cheaper than paying people for digging). Also there are much better ways :) Say... getting ur medical files from the hospital or ex school, or just calling ur grandmother. And since some days I`m a programmer I guarantee that having a blog can be 100 times more embarrassing and revealing than having to throw something out.
I take the risk every day and use both dumpsters and blogs though ;)