It came to my attention a few years ago, that SQL code could easily be injected into forms that interact with a database. This can cause many problems.
How to be an Über Web Designer
Saturday 15th April, 2006 - By Woolie 
Well, this is my first rant… I think it’s pretty harsh so I apologise in advance. I have a real problem with most of the modern day web designers. In this article I will describe to you how to become a “web designer”.