Youngbiddy, I was the same as you. When I was a teenager, I had no idea that you couldn't keep wild birds. I used to raise birds all the time!
Now, I am a licensed taxidermist, and I have to know wildlife laws. I could be fined and jailed for keeping any wild bird, alive OR dead. In fact, any person without a bird rehab license can be fined (and possibly jailed). The game wardens can come to my residence and inspect me at any time, and they have done so in the past. Yeah, the laws stink, and I didn't make them. But, since I know the law, it would be wrong of me NOT to warn people. Will the game warden come to your house? Probably not. But the risk of someone turning you in is there, and the consequences are very real.
Do you know how I found out that it is illegal to care for wild birds? Let me tell you, after years of raising various songbirds:
When I was 17, I found a nest of Canada Goose eggs. I took some home, and 1 hatched. I raised him, and he was the greatest pet ever. He followed me around wherever I went. In a few months, he was full size, and I would take him into the woods next to my house to swim in the creek. I would run up and down the road, and he would flap behind me, trying to fly. We had a fence in the backyard where he lived, and he was very happy. I even took him in the car to a park, where we swam in the Potomac River together.
One day, out of the blue, a game warden showed up at my door. He told my mother that it was illegal for us to have this goose, and we were to release him immediately. Despite the fact that the fence he lived in had no roof, so he could theoretically fly out of it. He did tell my mother that the goose seemed to be very well cared for, but we still had to release him. I don't know who turned me in, probably some nosey neighbor who saw me running around the street with a goose!
Anyways, although I don't agree with some wildlife laws, they do exist, and it would be wrong if I didn't warn Scissorchick.