Not joking, explain the difference between me subscribing to a magazine and mailing a check, and your 0-confirm transactions. Penny Stock Weekly won't be able to spend the check I sent them until it clears, your trading partner won't be able to spend the unconfirmed transaction. Where's the difference?
So you're saying the following:
- Double-spending a TX is easy and can be done by anyone
- It takes the same amount of time for a unconfirmed TX to get confirmed as it takes a check to be cleared.
The time difference is huge. We are talking about proper TX's here.
Update: I'm not going to waste more time on you. What you're trying to pinpoint is not of relevance.