IRS (and the Congress) certainly can pick on big taxpayers and not the small ones. It's done every day.Quote from CoolTrader:Day trading IRA is a wide spread practice in the industry. If it is illegal, all of them should be banned. IRS cannot just pick on the big traders, and let go the smaller ones. You can challenge IRS in court if you become their target.
It is not "illegal" to buy and sell in an IRA, so there is no reason to ban it.
What might be construded as "illegal" is not paying your taxes and not filing the apporpriate tax return for the IRA.
The applicable tax form is found here: http://www.irs.gov/pub/irs-pdf/f990t.pdf