That just sounds so malicious! My first thought was, it was someone who's been gathering eggs from the hens where they were freeranging? Still, it's so hard to understand, that's only grasping at thoughts though... and really it doesn't matter too much.
I think if I was so new, and somewhat of an outsider too... I might go talk to some long time residents who might have some ideas about it. I don't know the local situation with the police there, and maybe you need to report it right away, or maybe it's best to consult someone in the neighborhood who knows all the locals and might have an idea about what's best to do.
It sounds like people have been very warm to you for the most part and there might be something locally going on. I know what I'd do here in the states, but I've traveled a little, and I say that since you are a n00b there, I say ask some questions first, (some here may criticize this advice, but it's just my personal opinion).