C-c-can't we all j-j-j-just get along?
Get with the officers of the club, work out some rules, post the rules and everyone abide by them.
If you've got the bench, it should be yours to use. If someone gets it before you, it is theirs to use. Simply a case of first come, first served. No club member should own benches at the club's flying field, they should belong to the club for everyoneto use.