Is it safe to expose an AWS instance ID?
Solution 1:
Yes, it is safe to expose an AWS instance ID.
You can find many posts of AWS personnel in AWS forums, asking users to post their instance id so they can have a look and then they're like "Yea, I can see the issue..." So I guess it is safe.
Here's an example: https://forums.aws.amazon.com/thread.jspa?threadID=24525