When running (btc-/ltc-/whatever) wallet as daemon, I have to set "rpcuser" and "rpcpassword".
There is the option "rpcallowip", it is recommended to have this value very strict, e.g. "127.0.0.1".
I cannot see any danger setting this value to "..*.*" - if anyone guesses my server and credentials, he/she is welcome to mine for my wallet.
So, is there any danger opening rpcallowip?