[troad]

To be generous to OP, none of this is intrinsic to FOSS.

I write a library. I put it up online, for other people to use, if they like. At what point did I assume any responsibility to play nice with others? Or work with others at all?

There's FOSS licenses, and then there's the social expectations around collaborative online development, and the latter is nowhere implied in the former.

FOSS was not historically weighed down with all these social expectations. Forking was not seen as some community failure, but the basic purpose of FOSS. Sites like GitHub were a major part of this shift.

[account42]

Spot on. And with the slop pull request currently plaguing the open collaboration model I foresee more projects moving (back) to the take-it-or-leave-it model.

[gchamonlive]

Late to the party, but you can also do KYC on contributors, no need for black and white take it or leave it return to the dark ages.