Yes, but oddly I often delete before I post the answer, a confidence crisis.
It is easy to take a vote as being about you but it is about the comment you have left as an answer. Everyone has different view points on things, so I think over time it balances itself out.
If I got a - 5 it would make me stop and think but a -1 on something is probably someone with a different point of view.
Oddly I just looked at mine (past answers) and it made me laugh. One negative response might have been the way I worded my answer (about using carrier bags) - it -my answer may have sounded arrogant and I am not. The other was my response to what would I do if I was stranded on a desert island- I think the fact that I wanted to use a mobile phone to be rescued by my family went against me. Hope this made you smile but of course I risk a - vote if not.