I have had this objection before. I don’t know if it’s technically lashon hora, but I find it very distasteful when in the midst of discussion about an unfortunate occurrence or even a tragedy, people bring up what could or should have been done differently.
Whether the intention is to lay blame or not, that is undoubtedly the result, and whether it be lost tefillin, or a fire, or a vehicular accident, I sure hope the loved ones don’t read these discussions.
Save the safety tips for a different time, or keep it private.
Individuals perhaps, but not the klal. All such comments directed to the individual had been deleted.