It means you get involved. Technically, our local forms of government are not participatory democracies. Officially, participatory democracy is direct democracy, in the sense that all citizens are actively involved in all important decisions.
It shouldn't if washed with gentle care. Rayon is a cellulose fabric and like most cellulose fabrics, it may shrink when washed. If the manufacturer has indicated the garment should be dry cleaned only, do not push your luck. If it is hand-washable though, you can use the gentle cycle on your washing machine and Woolite to get the job done.
Rayon knits must be dried flat or they will stretch out of shape when wet. There are some new micro denier rayons on the market that look and feel even closer to that elusive goal of artificial silk. In the future these fibers will be made into fashion garments that look like wools, tweeds, dupion, but all light as a feather without the bulk or weight.