SkyDrive is an infant child and has a long way to make an impact in the file sharing arena. While SkyDrive works great with Office 2013, I am still seeing issues with syncing on multiple machines.
Any how, hackers have already started spamming it. I recently noticed two unwanted files in my SkyDrive.
If you select a file and right click on it, you can remove it.
And on the same screen, you may report it as a spam.