Sure, but the government is subject to popular pressures. They can't imprison or otherwise hassle even a substantial fraction of the population in any meaningful way. Corporations are not subject to popular pressure. They can hassle millions of Americans and get away with it.
As a practical matter, you have a lot more to fear from corporations misusing your private data to deny you jobs, mess up your credit, etc, than you do from government misusing your private data to shut down your anarchist political movement.
I think the TSA and no fly list counts as rather large scale hassling. IMO the real problem is it's much harder to fight the government than corporations.
As a practical matter, you have a lot more to fear from corporations misusing your private data to deny you jobs, mess up your credit, etc, than you do from government misusing your private data to shut down your anarchist political movement.