My cats climb up on the shelf I'd put up for the shoeboxes of scraps...they knock the boxes down, so now the boxes are on the floor. I had 2 other top shelves they've knocked things off of so they could lay down. The room from about 5' up is THEIRS! LOL Yes, I always have cats on the quilting. Try putting their quilt up as high as you can...maybe they'll take it over then!!!
Oh -- and I caught Dasher picking up things off the sewing table and dumping them on the floor -- one by one.......DANG it...he's WORSE than a 3 year old kid!