Yes, mods were being gracious with the use of name initials, I'm not sure there is a problem with them still. The majority of people began using SG because there is no POI named but a SG was discussed in MSM therefore fair game for theories.
In the interest of purity most of us switched because we can't ever be sure there wasn't someone else living, visiting etc the home.
Even if we believe the SG got a ride home from Dani, there is no telling who was in the home when she arrived.
So, old timers like to stick to facts in here. The fact is We have no named person, just a ghost called SG who may or may not have anything to do with her disappearance. Make sense?
Quite honestly, the TOS is well written and crystal clear in what's allowed or not. I encourage newbies to read it a few times and refer back to it, it really is the Bible in here.