Today someone can write out tabs, put them on the internet, and give them away to anyone in the world. Even if that person doesn't charge for their work, it's still impacting the rights of the original musician or the company he has a contract with. It's more visible now because it's easy.
actually I suppose it is very similar to the casual copying that we have gone on with music...
You CAN buy tabs...... or I can make you a copy of the ones that I have (either written by ear, or bought from the store)
You CAN buy the CD..... or I can burn you a copy.
hmmm... makes me think about this in an entirely different way!