It's plain inconvenient to walk like this. The problem is, this doesn't scale. While this could be acceptable for a person some may call a "tinfoil-hatter", it

It's plain inconvenient to walk like this. The problem is, this doesn't scale. While this could be acceptable for a person some may call a "tinfoil-hatter", it's certainly unreasonable to think of general population to walk with rocks in their shoes and heads masked. So, this doesn't solve the issue.