Case in point on credit for ideas: Shipley reports him saying he invented a parameterization of shell designs in nature. That subject got a few pages in a Richard Dawkins book, and I'd remember if Dawkins had credited Wolfram. (Maybe Wolfram got it independently. I don't know.)
Wolfram is extremely litigious: http://cs.nyu.edu/pipermail/fom/2002-July/005692.html
He's also notoriously skimpy on giving credit for ideas.
while I haven't heard any specific claims of patent troll-ism, I suspect he has a ton of patents on Mathematica and Alpha.