Octagon Shaped Weight Plates

[Efourdee]

What genius invented these?

I had the honor to workout at a 24 hour fitness the other day and it was definatly the worst gym setup i've ever seen.

The entire floor wall to wall was made of uneven sport court squares. Basically totally unsafe for any kind of standing lifting. Then there were the octagon shaped plates which brings me to my question.

Has anyone ever lifted with them and is there anyway to deadlift with these things without them rolling all over the place?