There's no system in place to audit Bitcoin transactions. The IRS can't do squat in regards to Bitcoin.
Don't bother filing. Don't ever bother filing if you just put your Bitcoins through any service. There's nothing to hold you accountable.
all well and good unless your converting to fiat. the second you do that, you have to explain where the money came from.
my recommendation, if anyone has 10k+ of bitcoin income, talk to a good accountant. less than 10k, still a good idea, but the IRS probably won't be as interested compared to larger amounts of money.