Outdoor Tech makes the Chips 2.0 speakers for your audio equipped ski helmet. It give you the ability to have conversations with your other friends on the ski slope via a Bluetooth connection to your smartphone, and thence over the Internet.
First problem: all the conversations go through Outdoor Tech's servers.
Second problem: in order to set up conversations with your friends, you have to set up a group. You have to search for your friends names. While searching, it turns out you can, with very little effort, find absolutely anyone who has registered the speakers. And their email addresses. And their phone numbers.
You can also find out where they are.
And reset their passwords.
This would make a good gift for your skiing friends who don't think security is important ...
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