Saw blades are unusable/unsafe after a triggering incident.
There’s really nothing to train people for other than to be sure their stock has not conducting elements, e.g. nails/staples, general wetness (green wood or treated lumber), and anything else that may create a conducting medium (sometimes lasering some woods will do this). Metal detectors and moisture meters can help with this, as will a policy for only dry lumber (e.g. kiln dried).
Note: Sawstops have a feature that allows the conducting detection system to be disabled for a single on/off cycle of the paddle; it needs to be re-enabled each power cycle.
General expectation here is if you trigger the Sawstop because you weren’t using your head or following recommendations (e.g. check wood for metal and moister), or just stoopidity (you ran the metal miter gage into the blade), then member is responsible for paying for new brake and blade (~ $200, give or take). If the incident is one in which actual fingers, limbs, etc. are saved, then we consider the trauma involved sufficient payment and are glad the system worked.
You’ll want a recording camera with a clear view of the table and it’s usage, i.e. need to be able to see clearly what triggered the Sawstop.
Your membership is still at a level that the likelihood of a serious accident is small, especially if most of your users are skilled and engaged and looking out for others. But I’d say your next saw purchase should be a Sawstop or something that limits potential for injury and also liability…I imagine it would be really hard to explain to someone who has just lost a finger or two why that decision wasn’t made.
