If you release a product then at the minimum it's your responsibility to make sure it's not going to harm others. If you can't do this then you shouldn't be releasing open source software.
Adding a disclaimer at the bottom doesn't absolve you of gross negligence.
Because they obviously would be not legally binding. Again, you can't absolve yourself of gross negligence any more than you can sell yourself into slavery. And legally speaking, selling something almost always includes giving that thing away for free. (Except for in a few cases where gifts are specifically exempted, like for some low-level drug crimes at the state level.)
Remember .. cigarettes? Arsenic Wallpaper and cloth[3]? Radium cosmetics [4]? Toasty warm Radium blankets[5]? Shoe fitting x-ray fluouroscopes[6]? Lead water pipes[7]? Sugar? Guns? non-fire resistant household furniture? Dinitrophenol[8]? Asbestos? Leaded petrol? CFCs? Unsafe buildings? Bisphenol-A? BSE related beef? 3D printers and their carcinogenic particle side effects[9]? Trans fats[10]?
and then why we have things like the CE marking safety standard in Europe. On and on, products are harmful by default until government steps in and forces manufacturers to make them safe(r). The free market cares about profit, not people.
What's next, people who make products are responsible for making them safe?
[1] https://en.wikipedia.org/wiki/Seat_belt_legislation
[2] https://www.history.com/this-day-in-history/federal-legislat...
[3] https://hyperallergic.com/329747/death-by-wallpaper-alluring...
[4] https://www.atlasobscura.com/articles/objects-of-intrigue-lo...
[5] https://www.sciencephoto.com/media/364732/view/radium-blanke...
[6] https://gizmodo.com/the-insane-cancer-machines-that-used-to-...
[7] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2509614/
[8] https://www.theguardian.com/science/the-h-word/2014/feb/06/d...
[9] http://blog.ichibanelectronic.com/3d-printers/3d-printers-ca...
[10] https://en.wikipedia.org/wiki/Trans_fat#Public_response_and_...