Fragile stickers do not work on your checked bags
I have worked as a baggage handler for 11 years and I constantly see checked bags with fragile stickers. I think passengers believe that if they put a fragile sticker on their checked bags that will somehow make a difference in how the bag is treated.
Baggage handlers do not care about your fragile sticker.
The pictures below is of an acoustic guitar and the box is clearly marked fragile. The passenger also wrote it all over the box. Now don’t get me wrong, there are some of us that will take extra care with your bag but that’s only because we don’t mind taking extra steps to care for your fragile item.
However, everyone isn’t like me and our job is to load and unload bags, not to gingerly place it in the plane or in a cart. If there are fragile items that can’t be carried on with you, then you need to send your bag by cargo or find out the different options the airline you are traveling on has for fragile items. Usually that includes paying much more than you would by checking your bag but if what you are traveling with is of value to you, then it is my recommendation that you pay the extra money to ensure its safe arrival. Plus, when you check a bag there is no insurance you can buy to guarantee a safe arrival. If your fragile item shows up broken, you will have no recourse. But if you ship it through the airlines and pay whatever fee they charge, you will be insured.
If paying a shipping fee isn’t possible, then make sure to wrap your items in plenty of bubble wrap which can help your items immensely. Bubble wrap can be purchased rather cheaply in stores all across the country and the extra time it takes for you to wrap them with care will give you more piece of mind when you check your bag.
Have you ever marked your bags fragile? Did the bag(s) arrive safely?