If I setup an image host, and hotlink an image here...I would have the IP addresses of all Memo active memo users. I'm sure there's other vectors, but privacy is foremost in my mind.
Not sure is real concern. Imgur & memo.cash have that info. If you really are concerned, should use VPN. Even without this technique, ISPs see what IPs connect & can give info to gov.
It's a user-facing issue: HTTP requests for URLs embedded in the blockchain will be fired regardless if I'm running a local instance. Autoembed can be turned off, but that's not ideal.