in my opinion, even at the risk of agreeing with myrkul, on a personal level, you are always responsible for everything you do. both regarding any direct consequences and any consequences that you could have foreseen. meaning if you choose to be ignorant about something and in consequence lack the necessary knowledge to make a good decision at some point in the future, thats also your responsibility.
Well, that's the risk you have to take...
Eventually, unless your response to everything is, "More laws! Bigger government!" you're going to agree with a libertarian about
something.
I don't think responsibility is infinite, but it definitely goes a lot farther than most people like to accept.