Darkcoin is closed source[0] and the creators[1] of Darkcoin show no history of working with cryptography, peer-to-peer, or any form of anonymity/security in general. One of the two founders does however have an interest in "financial markets and economics" and nearly all tweets on the official Darkcoin Twitter account[2] are about the market price. This reeks of scamcoin.
[0] http://wiki.darkcoin.eu/wiki/FAQ#Is_DarkSend_open_source.3F
[1] https://www.darkcoin.io/meetteam.html
[2] https://twitter.com/DarkcoinCrypto