Yeah, knowing how to 'work around' these things is not always a blessing because you just realise how easy it is for others too. :/
You know, I've seen quite a few stories about fans noticing a stolen artwork and reporting back to the artist and it is good to see that 'not everyone is a selfish arsehole...' :P
At this point, I know I'm not ready to put any artwork up for sale however, I do see the potential for photography. Even in this field, I'm still a beginner and don't feel like I can compete in a commercial sense but every now and then, there'll be one shot out of a hundred that I look at and think, 'wow, that's the money shot!'