Project X is coming. Genesis-Mining is going to support the x11 and x13 algorithms soon. Also the "merged mining" between different coins should be possible in the near future. Prices dropped to $17.99 per Mh/s per LifeTime Altcoin-Contract and $9.99 per 10 GH/s per LifeTime Bitcoin-Contract.
This goes to everyone who doesn't know Genesis-mining by now. Genesis-Mining is the largest and most profitable cloud-based provider of scryptmining. This is your opportunity to mine Scrypt based Coins as DogeCoin, LiteCoin, FeatherCoin, AuroraCoin etc. and get them automatically paid out in BTC...
Laws are local by nature so it depends on where you live as the regulatory framework that governs cryptocurrencies in each country differs. For most countries cryptocurrencies are legal.
It would be safe to assume that if Bitcoin is legal in your country, so is Darkcoin...