I agree that this is not a good idea.. mittens and hats, yes,, keys, no.. It's easy for someone to take those keys and then try them on cars and houses in that area. Better to turn them in to some officials,, or keep them and give contact info.. Even to use the clickfix office and mediator. So, please yourself remove them from the tree,, add comment to this post that they can contact someone and describe them to you before you just hand them out.

If I was in the area I would take them down. Criminals are everywhere looking for an opportunity.

I also would like to add if these were my keys I would rather have someone dispose them instead of what was done.

well, that's you xyz, but, hmm I'm not sure.. may be. so what is your positive suggestion? What would you like the finder to do with them?

I lost my keys sometime on Sunday..There r @ 4 keys on th eing and really stand out..There is a black canister of pepper spray in the ring as well as a New Orleans key chain??? PLEASE contact me if this is the set u have..I really cant tell from the photo..THANKS!!

Neighbor
My positive suggestion is to remove them before they get into the wrong hands.
Hillfornow,
I would go check it out yourself before they get into the wrong hands.

Not a lost pet. http://centralpetvet.com/elements/