Advice Check those suitcase pockets

I recently started following the U.S. Department of State: Consular Affairs Facebook page. Their posts are super informative, especially about travel safety. One tip that caught my eye was about checking all the pockets of your suitcase before and after flights. Apparently, it's not uncommon for items to be misplaced or even for things to be planted in your luggage. Has anyone ever found something unexpected in their suitcase pockets? Or maybe you have tips on how to secure your luggage better? Would love to hear your stories or advice on this.