[Fyron]

A few wasted colony ships are not a big deal for most of the game. They are really only a concern in the early game, when they can potentially stunt the AI's growth. As long as the cloaked planets are not too prevelant, it shouldn't cause too many problems.

Actually, I just realized that giving the planets null ability descriptions will not work because the planets will still have the ruins icon. What you can do is make a few dummy unique ruins techs that do nothing and then making a whole bunch of planets have those techs in them. This will create a bunch of planets with the ruins icons that have nothing useful in them, and so will have the effect of masking the real ruins planets. You could even just give whatever percent of planets would have no ability a dummy ruin, so all planets will have a ruins icon.

Or, make the ruins graphic completely black, so you can't see them. But, the planets will still appear in the special planets list.