However, I can't imagine the compliance nightmare that would exist around a process that lets HR people look up people's equifax information. If they get a full report, it could contain information about disabilities, national origin, ethnicity, religion, and enough information to construct knowledge about sexual orientation.
However, all that information is pretty worthless for most decisions. Aside from it being illegal to use that information for hiring decisions (in most situations), the equifax stuff isn't super accurate. I've looked myself up and it gets a lot of information wrong, most other people I know who have looked themselves up in have also found major inaccuracies.