I’ve given this some thought.
I think if you can get away with earning undeclared income, it makes sense to do so.
On the other hand, you can resist taxes even if you want to do everything above-board and by-the-book.
If the right opportunity in the underground economy comes along, I’ll take it.
I may decide not to discuss it on this blog, though, because that could be used against me by the powers-that-be.
As of the time I’m writing this, I have not earned any significant amount of undeclared income and I still pursue federal income tax resistance through legal means.
This might change.