I read about this only last week .....apparently it is happening a lot now, near to Christmas .....low life are stealing wreaths and flowers and selling them from stalls they set up at boot sales and markets ...and who is to know where they come from ? Some people have suggested tying them on with wire (but it can be cut !) or alarming them (but who would hear it >),,,,,,,perhaps some smart water sprayed on them ....but then who would be able to find them anyway !........better still have a little plaque made and fixed to the grave denoting that in memory of a loved one you have made a donation to his.favourite charity at Christmas .......so there will be no flowers or wreaths to steal ......sadly no one patrols anymore ....you could take a photo with the date and time showing, when you leave the tributes there .....don't suppose the Police or Cemetery would take much notice but at least you would have proof ! 