What a great idea! Ones server could serve the latest tweet, or current location, anything. I think there are a lot of risks, sanitizing input from “random” hosts mostly, there’s a chance that it could hurt your server when retrieved/stored or the client when it’s rendered. I wonder if you converted the curl results to a small gif, would that help or hurt the experience? One could run the conversion code in some sand…
The text stored "should" be sanitized by the framework I'm using. Hopefully nothing funny happens.