I support this 100%

I think it would give peace of mind to anyone who has been in the position of being stalked for whatever reason. Paying for a server transfer and name change does nothing to prevent you from being found. I have seen far too many cases where people have been harassed in-game for extended periods, despite going through the official channels and trying to get support.

Since Square will have all account information, I don't think the argument that this will protect bad-actors holds water.
As to FFLogs, it's a third party site and Square have no control over it. However, I don't think we should just accept things as they are simply because FFLogs exists. It would be nice if FFLogs would seriously consider making their site opt-in though.