Communication is a two-way street. You can provide information, but without understanding on the receiving end, you haven't communicated.
Here's an analogy: If you're shouting at a deaf person, and they don't receive the information you're trying to convey, who is at fault? You are, for failing to communicate in a way that is meaningful to your audience.
This applies in relationships, too, which is something I have had to learn thoroughly and painfully; I can talk, but until my partner understands, I'm not communicating effectively.
Obviously, in all of these situations, some responsibility belongs to the receiving party, as well (assuming they asked for the information you're trying to impart; you can't just go around screaming at people and getting upset when they don't listen) -- they need to make reasonable accommodations, like asking questions or notifying the originating party if there's something they don't understand.
Bomb Dropped - 11/08 Working on the R - 12/08 (thankfully short period of time!) Still DBing to see positive changes!