All you earn in faucets is just dust anyway, you probably can't even pay the tx fee. Just buy some bitcoins or earn some, and then exchange it to namecoin if you really need some.
Just out of reference - faucets are actually bad if you reuse the address with large inputs later on. If you don't have coin control in your client (only Qt has it) then you won't be able to specify which inputs are going into your transaction meaning that in all likelihood you may be choosing those dust inputs. The problem here is that dust inputs take up space without really adding to the value of the tx so you may have a crap ton of dust inputs meaning you get a nonstandard transaction that either requires a larger fee (usually more than all your dust combined) or you take a long time to get confirmations as some miners don't accept non standard txs.
