This has the potential to affect everyone in enormous ways because it takes firm root in a huge crack in our civil liberty protections.
It has been proven by many /. posters that civil liberty is something for people who sit at home and do nothing and doesn't apply to people who work, have Internet connection, a credit card, or leave their property. So I'll just repeat the main argument for you:
As soon as you get a job, you agree to a contract. Which means, your body, spirit, and soul belong to the company and they can do to you whatever they want. If you don't like that, you should look for a different owner or wait for the invisible hand to correct the market and retract itself from your cavities. There is just no other way. It might not be perfect, but it is the best system there is.
Asking for civil rights at the work place is asking for government interference with the market. This leads to mismanagement and a too powerful nanny state that takes direction from any anonymous voter instead of fully invested share-holders. If companies are blocked from accessing your private data, they also lose the ability to fully control you, which might interfere with profit. Anything interfering with profit is a violation of the free market and destroys our most valued freedoms. This ultimately leads to socialism and mass starvation like currently in Europe.