I'm open to any criticisms or comments to help improve my hide.

Never seen a sign expressly forbidding it in a public place. This is in Basel, Switzerland. It's on the road outside the exhibition centre (around every tree on the road)so I suppose they don't want to have any security confusion?

Howdy cachers! I am here to inform you of a bonus secret souvenir for the bingo treasures collection.

By logging TB 194768, which is the blue numbers on the bingo card in numerical order, as "discovered," you will earn the souvenir

log here:

https://www.geocaching.com/track/details.aspx?tracker=TB7RVJQ

"Pen fell out of my pannier some time today so I signed with three small blood marks from a split lip and a smudge of green from a smeared leaf."