if you measure the solubilities of some salts and publish them, and your data is widely used and people rely on it, do you therefore have an obligation to repeat your experiments to make them more precise and correct erroneous measurements, and to extend them to more salts? i think not; i do think you have some ethical obligations, but they are limited to admitting that you were wrong, and not taking credit for others' work
if the users of your work start talking to each other and helping each other, they might become a community, but that still doesn't impose an obligation on you to do more work for them. to my way of thinking, you're the person in that situation with the least ethical obligations