"This checklist is simple, and by no means complete. It is a list of some of the more important issues you should consider when creating a web application."
But I'll try to make that clearer. I'm limited by space and peoples attention span. Having links to implementation notes will address your concern I think.
Might I suggest a simple "tag" for each suggestion indicating the appropriate market for that point. Eg good - your basic SAAS/casual web app. Great - apps dealing with moderately sensitive data. Extreme - you're building a bank, seeking PCI compliance, storing medical data, etc.
You could break it out at the top, and then it doesn't take much space in the body of the post, but still provides some context for which projects should be adopting this level of paranoia?