It amazes me to this day how many people complain about battery drain on their smartphones, but leave features like Wi-Fi, Bluetooth, and AirDrop on when they don’t need it. Which is why the AirDrop troll — sending totally random photos to nearby Apple devices with the feature turned on — is one of my favorite things to do to help those folks realize the perils of their behavior.

If you have trouble coming up with the perfect troll image to share, now you can look to AirDrop Cards for suggestions. The site, created as a hack project by Australia-based Apple accessories company Proper, lets you choose from a selection of premade cards to easily share with unsuspecting strangers. They…

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