People selling you things and telling you they're legal/designed for a purpose doesn't make it true. These companies want to make money.
For example, Anzo is a China based company. They don't care what bulbs you put in their housings, they're basically immune to lawsuits from North America. If you did contact them and ask about HID compatibility I have no doubts that they'd tell you whatever you wanted to hear, regardless of the fact that all their housings for these trucks are absolutely designed for 9005/9006 halogens.
@thegawd I think this is one of those occasions where we'd be wise to just let this conversation die. It's pretty obvious he doesn't want to hear what we're saying.