Hi, my name is Julie and I'm one of the moderators for the French-language Office Live Workspace forum.
One of our users had this to say, so I thought I'd pass it along. :)
"In a specific workspace, it appears that an 'Editor' can delete a
document => that's dangerous..... Should this option not be reserved
for the document's creator himself (or the creator of the workspace)?"
http://fr.myofficelivecommunity.com/discuss/forums/t/4215.aspx
Further, one of his collaborators was able to delete a document that he (the original user) had created, and the logs showed that it was he (again, the original user) that deleted the file.
Julie M.
Official Microsoft Office Live Workspace Moderator - French-language