Anybody who knows me well enough knows better than to drop by unannounced.

If it isn't a freaking emergency than people need to use discretion when coming by my place. If they won't be considerate of my time and my space, than I let them know in a not so nice way that they are being selfish and annoying.

It all boils down to respect: if people can't respect you, why should you respect them in return? Respect is earned, not given. If people have a problem with that, I will gladly show these bastards the door