I was there. 
That's people with phones. Many people obviously
didn't have a phone and is provable once you see how
packed the crowd was and the areas with no signal.
I don't care if I'm being tracked. 
I’ll bet every FReeper is being tracked.
I have little doubt that you are right, not to mention being on a "domestic terrorist" list.
A pretty safe bet.
And safe to assume that every FReeper who has ever posted has been identified by name and residence address.
Such things are well within reach of small organizations or even extremely skilled individuals using current techniques. Consider it is probably a training exercise for multiple agencies these days. You have got to spend that budget allotment before year end. Maybe you can hire a contractor outfit to sweep that blog and update the list of names. Don't you have a friend who runs a company like that? Maybe you can put out a no-bid purchase order. It is scut-work anyway, and your analysts really don't want to bother with it.
The problem is that people move, get married get divorced, change their names, or just pass away. The quality control of those lists might be assumed to be terrible, with at least a 25% error rate in the identifications. And the length of the lists is too long to do much of anything useful with them. There are a hell of lot of posters out there and so many blogs.
The agencies have plenty of analysts but are short-staffed when it comes down to investigators. Or black bag people. That is probably a good thing.
But a longer list means they must be doing something. Next year's budget justification is not going to write itself.
Note: the preceding comments are speculations posted for entertainment value. Any similarity to actual events or people is purely coincidental. No animals were harmed in the making of this post.
I was there.
That's people with phones. Many people obviously
didn't have a phone and is provable once you see how
packed the crowd was and the areas with no signal.
I don't care if I'm being tracked.