i too often worry if someone leaves without saying goodbye, in any way. rather than trying to "fix the software", maybe we could encourage each other to make a small comment when leaving,, tc, gotta go, f.u. ,,, anything that would let us know why they left voluntarily. it's just good manners.

i have learned to assume that i don't know why they left, and if they come back, i'm glad. best wishes, Gus