Noticee that the flame is far more transparent than, say, the flame from an Atlas or Saturn V.

Yes, absolutely. The Titan engines are larger too than the LM ascent engine. The white part above the nozzle is the combustion chamber, the component on this rocket that I've spent the most time studying. It's about 12 inches in diameter at the throat.

Note also that the "smoke" in this picture is actually water from the water suppression system. It's being hosed upward.

The Atlas and Saturn and space shuttle burn different fuels and so they aren't subject to direct comparision. But in the other picture you can clearly see the difference between the conflaguration of the ignition transient and the smoothness of steady-state firing.

There are dozens upon dozens of films of the Titan 2 being fired as an ICBM. The conspiracists have obviously seen none of it. Most of the conspiracists simply return to the same invalid comparisons to the shuttle RCS engines, obviously because that's the only detailed description they have of such rockets firing. Therefore the oddly ignorant assertions that the shuttle and LM burn "the same fuel". That has to be true, otherwise their argument falls apart. So they simply declare it to be true and sidestep around the fact that not everything with the word "hydrazine" in the title behaves the same.