A toll-free phone number for your Shopify store gives you credibility and signals your customers you’re serious.
From the Schneier on Security blog
This is yet another insecure Internet-of-things story, this one about wireless gear shifters for bicycles. These gear shifters are used in big-money professional bicycle races like the Tour de France, which provides an incentive to actually implement this attack.
Research paper. Another news story.
Slashdot thread.