While I agree with you in one sense, this wouldn't even be an issue if people didn't willingly post their entire lives to social media. I don't understand how one can be too upset about someone looking at data that they themselves decided to make public.
Back when I started using Facebook, it was obvious that you're building a profile to be publicly accessible, i.e. viewable by random strangers, and everything you posted publicly you did with the intent of it being a part of that public profile. It was kind of like blog, but with guaranteed active audience.
The intent has changed vastly over time.
By the time I was a senior, one of my parties got busted before it started because I forgot to lock down the invite.
Probably won't happen anytime soon, but eventually I think a service like this will exist.
Why Americans don't value their privacy or enjoy being harassed by sales people is beyond me.
Yes, this process is automated and usually works, however, the systems don't know everything, and you have to manually override the error to ship the product.
With that said, I think it's grossly irresponsible to look people up on all their social media. This is part of considering customer trust.
I've yet to hear about sellers stalking customers in the real world, but IMO, there isn't any difference between doing this stuff online and the real world. Please don't do this if you are planning to be a seller.