well it is your fault, i don't think that they care after all, they will tax you regardless, if you exceeded a certain amount, and you gained from your trade
the tracking before the birth of the rule for bitcoin by irs, should not be counted i think, but i'm not entirely sure about this
another note, what about if i send all my bitcoin abroad and i exchange them in a foreign exchange(after a gain on trading), then i transfer the funds in the usa, the taxes are the same? there are different rules?