No warning from the future

Possible Reasons why I haven't yet had a future version of myself stop me from doing something stupid:

• Future me knows it will all work out in the end so he doesn't bother.
• The paradox of interfering with his own past prevents him from coming back in the first place, making it impossible (the interference, not the time travel).
• Time travel is not publicly available before he dies.
• He has a limited number of trips back and this particular mistake doesn't warrant one of them.
• He's actually already here, influencing events without my knowing.
• That's just not how it works.

These are the sort of things I wonder as I traverse a strange neighbourhood at sunrise. That, and how much I wish the last bottle of champagne I bought was actually a R250 cheeseburger.