One of the mistakes of the newbie is gambling their satoshi that they get from faucets and complaining for their loss.
I think it's the most rarer mistakes of newbies. Don't get me wrong here, we're all ones a newbies here and tend to treasure our Satoshi that we got from faucets. Those who gamble their sats earned from faucets are greedy ones (except if the faucet is on gambling site). Those big rollers and new from bitcoin will only buy Btc to gamble, they don't want to earn it on time wasting faucet.