Isn't blackcoin against NobleCoin, and Mintcoin, and basically every other coin it perceives as competition (all coins)?
No, not really, don't get caught up in this false dilemma.
You might get this picture, but this is a smokescreen.
Coins are currencies and as such they are financial tools.
It is up to the user to make good use of the available tools.
Obviously some tools are better than others,
but the myCoin vs yourCoin attitude comes from the devteams and the users should not get carried away.