Then you totally misunderstood the post! When the person that said that maybe some step kids deserved being shot, it was in the context of, there ARE some people in this world that deserve it, and SOME happen to be someone's step kid.Relax and take a step back - at no point did he say you said exactly that. He did say that is how he understood what was said. If he misunderstood - don't get your panties in a bunch - correct him/set him straight.
There's two ways to handle being misunderstood:
1. Get upset/pissed/angry/defensive.
2. Simply clarify/elaborate and help the other party to understand if they're willing.
You said it - others will have to interpret it. We're not all the same - we don't see the world the same and we do not have the same experiences - others will certainly have different perspectives and will likely interpret what was said differently especially if the message is vague/ambiguous/unclear.
I myself did understand a few posts as saying that some stepkids deserve to be shot just for the sake that they're stepkids. Now I also am fairly certain that isn't exactly what was meant but it is what was in the post without 'reading between the lines' [i.e. speculating as to what was actually intended.]