But then I remembered that as a kid I used to spend hours copying my favourite artists into my sketch book, just putting pencil to paper, studying style, form and technique.
Learning from and appreciating amazing comic book art gave me so much enjoyment as a youngster that I can't really be annoyed at some one for doing the same thing.
This is the advice part:
When I was doing my little studies in my sketch book as a kid they were just for me and my own enjoyment and not many people saw them, the internet has changed that.
Everyone puts every little thing they do online now which is cool, but posting things that you probably should have just kept in your sketch book can be problematic. The art community is a small one and the one thing it doesn't forgive is an artist copying another's hard work and taking credit for it.
You don't want to be known as that artist, people will lose respect for you/your art and it will be very,very hard to earn it back!