im·ma·ture
adj.

1. Not fully grown or developed. See Synonyms at young.
2. Marked by or suggesting a lack of normal maturity: silly, immature behavior.

Source: The American Heritage® Dictionary of the English Language, Fourth Edition

My idea of immature includes defacing other people's property in a lame manner (if you're going to vandalize, make it art!) and a new, un weathered board in a fence of old grey wood.

Taken with: The Olympus D-510 Zoom