The closest I saw to something like this was the redefinition of what constituted a "terrorist", which in pure theory I didn't have an issue with the definition, but in practice I thought it was FAR to broad and theoretically one could be considered a "terrorist" under a STRICT reading of the section if you were disturbing the peace while at a political protest. I'll come back to this and update with what section it is in particular once I can look back at my Thesis.
Now, I'm not saying this provision is not found within the Patriot Act, it may very well be. I've read a large portion of the Act but the thing is gigantic and in many places a mish mash of legal terms and simple small adendums to entirely separate laws. I focused most specifically on the sections that were most routinely brought up as problematic by its critics.
Sorry I couldn't give you anything more specific. If you find or have an article talking about it that gives some reference to where abouts in the Act to look I'd gladly research it. However, at the time of my thesis (which was a few years ago; thankfully some things have been stripped out since then or sunset) that was a popular "complaint" typically found in political circles and message boards but one I never found within a legitimized source critiquing and criticizing the Act.