How are you potentially damaging your eyes? If it’s totality looking through them is a waste of time (you won’t see anything) and outside that range you have hours to pass them around. The sharing part has no impact.

100% totality means there is nothing to damage your eyes. I stood exactly on the line a few years ago and we had over a minute to look at it without glasses. Don't be 2 seconds early or late putting the glasses on though. I stopped looking many seconds early to ensure I wasn't staring up unprotected when the sun started showing again. There was an app that talked through the stages with exact timings and a countdown clock which worked perfectly.