I think my experience was similar to yours. The reason I made it was to make the presentation of interesting data more accessible. But the lesson I took from it is that people put data to all kinds of uses, including those I didn't think about.

I was really surprised by that email, but it was enough to make me understand.

If you linked to your sources, show prominently the last time the data was updated, don't give any advice and clearly state that it's just for interest only, I think this would be less risky.

But whatever you do, there will be someone, somewhere, using your page for a reason you didn't expect.