...which would still get you pwned for the snippet in the question I linked.

Again, I know that for someone reasonably familiar with base64 and bash it's obvious that the base64 example is indeed safe. Maybe you want to filter out people that don't have that level of familiarity (or aren't naive enough to execute bash code they don't fully understand). That's both very arbitrary and unnecessary though - HN is quite diverse. But of course, it's also up to everyone what they do or don't put in their profile.