Shoveled Out Public Spaces- Yours Or Up For Grabs?

The first decent storm of the year has now passed us. You dont have a driveway. You spent alot of time shoveling out your car from a public street. Now, you leave and head to the store or work.

Upon returning from your errand, the spot is now taken by someone else.

Its a yearly debate and it seems like every year, the opinions are split 50/50.

Does the shoveler "own" the spot now or is it up for grabs? Do you have the right to "mark" it?