It's wrong to steal. It's wrong for people to bring copyrighted and owned art into second life and sell it claiming they are the creators and it is just as wrong for me to take your texture and try to sell it as my own. Artist in any walk of life have the right to charge whatever they want for their product. If you don't like it - walk away.
There has been a rash of texture thieving going around and no I am not talking about you doing what you want with your product that you purchased for your own personal use. After all any artists knows that if they really love their work and don't want it altered they should not sell it (and that is why we should respect the generosity of the artist especially in second life- they are extremely giving). But, what I am talking about are people ripping textures from objects or prims and taking those stolen textures and selling them. It's got to stop. No one will want to create, share, sell, or give anymore. So take a stand and fight for the creators. After all without them this world would be just as mundane as first life.
Further reading: Subtle submission
Come and join everyone and report these vendors for abuse here.
