You should get punished for going 1/10 in lane.
When you go 1/10 in lane, it is not by accident. It may be by pure lack of caring, not trolling, but that should be punishable too.
Maybe you shouldn't be banned for going 1/10 or 0/8 in lane, but you should absolutely lose more LP than your 3/1 adc. What a complete joke that we have a system were a 1/10 top laner and 3/1 adc lose the same LP for 20 minute surrender.