Really sick of Plush Xi messages

I get at least 3 or 4 of the following messages every day. Even if I don't log in.

The object 'Second Life' has sent you a message from Second Life:
Objects in Plush Xi are unable to be created because the parcels they are being created on are full. Notifications from this region are temporarily deactivated.

I would really like to mute the whole frickin region. I'm also constantly barraged with items I didn't create being "returned" to my lost and found.

Sounds like a script gone wrong. Perhaps not even yours.
Something that's 'Temp on Rez' going awry?
Or maybe a neighbor is (accidently) dropping stuff on your land,

could also be a Squatter. Have you looked for skyboxes hovering overhead?