In reading the comments of "The Great Lie - Lorem Ipsum" in regards to the necessity writing copy for the web, a large chunk of the comments mentioned that clients are often late with copy, would often bad copy, and often would passive aggressively force the designer to write copy.
Context (http://news.ycombinator.com/item?id=3013196)
Don't let this happen to you. These are contract and pricing issues. It's not OK to let a client push you around, force you to do copy if you don't want to, or pay you less than they should for a service.
A strong contract is in place to protect both parties from either scope creep or excessive charges. If there's a pain point in your day-to-day work cycle, put it in the contract and have the client compensate you for it.
The video "FU Pay Me" by Mike Monteiro of Mule Design explains this better than I can, and comes from the experience of 10 years in business.
You can find it here (http://www.doobybrain.com/2011/04/07/fuck-you-pay-me-mike-monteiro-on-how-to-get-clients-to-pay-you/).