on a more serious note now the vodka has worn off rather than it be metal theives coudl it not be that somone has taken them for someone elses graves?
when i used to have to go visit the grave yard there was never enough pots around and people helped themselves to ones not in use on other graves.Unfortuantly people are less considerate these days and probably take one and dump the flowers.
maybe paint your surname on the next pot you get so if it does turn out to be people borrowing pots they will be less likely to take it.
