NO ... NO ... NO ...
Recently we have had several instants of STRONG storms/microbursts coming threw ... and tossing boats on the beach around .... causing lots of damage. There are several methods of tieing boats down so they remain securely in place. So ALWAYS tie your boat down if you are leaving it in an exposed site .... or you just maybe filling out Insurance Forms ... for your boat ... and your friend's boat that your's lands on!!!!!!
Now, we used to bury tires in the sand w/ tie-down lines attached to them .... but that is frowned upon now since a old tire is considered toxic waste. You can bury a board w/ a rope tied to it, passing through a cement block (for additional wieght). Or you go to a local Arborist Supply or "Tractor Supply" and purchase "ground anchors" .... they come in different lengths w/ various size discs and screw into the ground. They cost between $6-$12 each usually. For normal dirt/clay I use a 30" lg w/ 4" disc .... for beach sand I use 42" lg w/ 4" or 6" disc .... I turn mine in flush/ground level on the lawn at the yacht club so that a lawnmower will pass over it w/o hitting it ... on the beach I tend to leave the shank up/exposed 3-4" .....
Back to your origonal guestion .... NO, I've never seen what you propose done for beach cat sail storage .... the H16 sail will roll around it's boom for storage (but it's tough on the sail as the beckets like to poke holes in the sail eventually). The H18 sail rolls best from the Top ==> Down (you fold the top two or three panels over). Then place in stage-box/tube .....
H-18 mag/ #9458
Fleet 54 Div 11