I believe the process is manual, handled by contractors. But I doubt Microsoft would do anything to modify the system now, since they plan to migrate all TechNet and MSDN forums to the new Microsoft Q&A site later this year.
I don't know if the new site has a similar process to verify accounts. Dave Patrick may know more. I have seen a few spam posts in the new site, but very few. They do have a report function to flag any spam. I noticed that the spam was gone shortly after
I reported, but I had no indication if anyone else had also reported.
Richard Mueller - MVP Enterprise Mobility (Identity and Access)