I have tried faucet and they are such waste of time don't bother with this if you don't have some kind of bots..
Signatures are good, but you are on risk to become spammer..
Trading and gambling is very risky. Only what stay is doing something useful for coins..
If you use good posts you have no risk of becoming a spammer just for joining a signature campaign. If your posts are small or bad, yes you will be treated as insubstantial posts more often due to having signature. But still for this to happen you did some crap posts. So do good posts and it is not a worry.
Only thing is some HATE all signatures and you might be ignored by some. But there is nothing you can do to stop this as its up to each person.