Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Many of my posts had -10 and -20 all on one day.
Did I upset someone?
I do not see how all those could get downvotes all in one day.