Its creating a rod for your own bag in the long run as it will encourage more and more people to get into pressure washing rather than something else if the information is readily available.
For those that really want it, they will find the required information by spending a little time.
For example the use of "hypo" - 2 weeks ago i ever heard of it or what it actually ment. Now i have a good idea and would be comfortable trying it on my own patio an then eventually on a customers.
I have started making word documents for all the different types of driveways/stone etc and the different staines they might have and the procedures for removing them (just from reading online). But thats because i am willing to research and learn rather than just following a how-to guide... Its more fun