I think the incidence rate of that is quite low compared to the amount of 'happy customers'. I suspect there are plenty of people that would suggest that you're fear-mongering at worst, and at best seemingly letting a rather rare incident distort your message.

Consider the opposite to your 'don't downplay shit' perspective: 'overblowing shit' can cause issues too. Best to respectfully educate of the risks, and yet ultimately understand that everyone makes their own choice, complete with consequences.