It's a good question I'll think about it.

If it is any consolation, the suggested AWS policy only allows view only access - I.E. doesn't give access to any data, nor to the ability to change anything. As you can see when you go to SinglePageCloud.com I'm sufficiently confident in it to publicly hand out my keys.

All I'm saying is I understand your concern, although the worst that could happen is what I am already doing, if you use the view only policy.