What, you'd never, ever forget to close it? And even if you didn't, you'd still have to open the doors to walk through them, AND you'd have to close them behind you, so it'd be even more of a hassle.

Shopkeepers have dealt with doors since there were shops, and I would hazard their need is much greater.

No, you're thinking of Munsia.

Its not that hard to just put an alias which opens doors automatically. Hell, you can make your normal movement thing try and open doors automatically when you move.

There isn't much need for an invincible door unless it was, as has been stated already, at least as expensive as the reinforced steel doors, if not more expensive.

Don't make it invincible then! I just want a convienient door. And I don't think that everyone will shut it behind them. I'm not willing to let just anyone in because some dork left the door open.

Shops aren't shared by 30 people.

I'm a special case. Look, I'm asking for special treatment. *whine*

You can close the door behind you, but others can follow you in before you could close the door manually.

#alias door {open door %1;%1;close door %1}

actually that doesn't work it would have to be close door %2 or whatever that command is to get the opposite direction.