First of all I never said, "go find an old thread." You lied. You either don't know enough English to ascertain that if you put quotes around something alleging what someone else said, it better be accurate, or you are a liar.
Regardless, now I see what you are talking about. You're worried about a possible tax penalty if you pay your debt within, rather than outside of the retirement account. Well, you didn't say that before.
Now back to the issue at hand and the topic of this thread: It's best to go with a broker that does not portend to be an overbearing mother by artificially restricting trading in a retirement account just to keep you from losing your retirement funds (and possibly incurring a tax penalty). Period.