Changing your mind too often is better than changing your mind too rarely, if on the net you manage to be confluent: if you change your mind by mistake, you can change it back later.

(I do believe that it's not worthwhile to worry about attracting attention of aliens - if that isn't clear - though it's a priori worthwhile to think about whether it's a risk. I'd guess Eliezer will be more conservative on such an issue and won't rely on an apparently simple conclusion that it's safe, declaring it dangerous until FAI makes a competent decision either way. I agree that it's a negative-utility action though, just barely negative due to unknown unknowns.)