I wanted to add the sinful repo to cydia but was using their old address. It wasn't working so I tried an extra "L" at the end (sinfull) and it worked but with lots of errors. It turns out this is not their repo so I've now removed it. I'm just wondering if removing it is ok and if this is known as malicious.
I'm asking this because I once added repo which kept putting an icon on my iPad after every reboot even once I'd deleted it! I ended up having to do a restore.