It doesn't matter if you don't know the person, just leave them alone. The odds of finding out whose they are over the internet is like the odds of gettin hit by lightning 10 time in a row. From the implications of your post I can only assume you are thinking about stealing them. Don't do that. How would you like it if you spent 2 or 3 months of hard work on a grow and come to find some asshole moved them. Or worse waited till you were about to harvest and stole your whole summers work. So I hope that's not what you are thinking about doing.