If the post that was down voted received nothing but down votes, then it would have a score of 0 or less, and would be easy to identify. If that's not the case, that means that there's someone out there that agreed with you/liked your idea/felt that you contributed something positive to the discussion. Most likely, more than one. So if you make it your goal to not make that kind of comment again, then sure, it's possible you won't be down voted, but you'll also be robbing others of a positive experience.
TL;DR: Stop worrying about your down votes, count your up votes instead.
I'm going to copy what I wrote last night for what I think about down votes here:
That's a good way to look at things and I do my best to practice this every day! :D