How would you feel if I poured water from my used personal water bottle into the community office keurig?
Why are you going to pour your water into the community office keurig?
Because I want to.
Pouring water from your used water bottle into the community office Keurig could spread germs and it is bad to spread germs in public things. Instead you should dump your water out somewhere where others won't be exposed to any of your germs.
You are being dramatic, no one will die from the germs in my water and I won't pour into the keurig anyways.
I'm not saying anyone would die but it's rude to intentionally spread your germs, especially at your office.