after dropping below 10k you will be reported even if you dont do anything that is reportable, thanks to unlimited reports that even count if you deactivate the communication and dont communicate at all.
in the last summary i got 28 commend and 24 reports and it increased by only 3 ?? 8061 – 8064
for anyone who ask why i dropped to 8k, i was 11.5k and got abandon because of internet issues that never happened in the last 2 years. i dropped to 10k and kept dropping after each summary.
Source: https://www.reddit.com/r/DotA2/comments/17u9pch/have_anyone_dropped_below_10k_behaviour_score_and/