

Pretty much everyone has, but that’s not the problem here. What if you don’t really want to give them a unique identification number like that? What if you don’t want them them to know you that well? What if you’re not even planning to use your real name at all.
There could have been a defect that caused immense stress in the glass. Alternatively, there could have been microscopic cracks caused by mishandling. Or both. Either way, a tiny temperature fluctuation was probably the final straw that broke the camel’s back. The actual root cause probably happened several years ago.