All you have to do is find the US Friendly Poker sites and play your poker there if you are from the US.  Sure in some States they have tough laws on gambling and the banks are under pressure to prevent people using their credit cards for online gambling.  But find out for yourself first, what you can and cannot do.  Best thing to do is read poker reviews to give you tips on the US Friendly Poker Rooms.

And, then always only play at the best online poker rooms, that have a dependable reputation.  The big gambling companies will always ensure that they are operating within the law, because they have too much to lose if they are not doing things properly.  Remember that your reputation is precious, once you blow that you are doomed!