Freedom...you can call your file that you upload whatever (this worked for me).
On finding bad backlinks...it would be nice if google provided more tools for this. WMT capping backlink exports to 1k when they show many more than that (in my case 20k) is quite inconvenient. I haven't found a third party tool yet that matches google's claim that I have 20k backlinks (and I've checked a lot!). Plus many of the tools all seem to have their various flaws. I'm trying to work with ahrefs now...but that only has 7k of the 20k links google claims I have, so this makes this very difficult to audit.