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I am living proof of this. When I started I actually didn't know about this forum at all. I was simply doing faucets and trying to earn some free coins. I think I found a different forum at one point but then found this one. The faucets eventually brought me to this site and I have been here ever since.
Yes, faucets could help a user familiarize himself on transacting with bitcoins, but what others don't know is that if there are too many dust inputs/outputs on an address, that would have a problem in terms of fee as it is calculated per kB on every transaction. To be able to create a tx using that address, you have to abide by the fee it requests or just let the balance in there and never bother using it again.
In the future, today's dust could be worth thousands of dollars. So we can use those dust coins without incurring large fee.