On "Runaway Greenhouse" Climate

From a comment I left on another blog:

One stumbles upon this term sometimes, but what does it actually mean for an planetary body to be "in an RG [runaway greenhouse] state"?

Considering that the influx of energy is (more or less) stable, any process that lowers the outflux of energy will only raise temperature up to a point, when a new equilibrium is reached (as increased temperature leads to increased outflux). To get an true runaway climate, one would need to lower the outflux to zero, something that is only possible at absolute zero – a state that will be quickly left behind in the case of influx of energy.

I can only assume that by saying "runaway" scientists actually mean "reaching a higher equilibrium temperature". So to me the term "runaway greenhouse" is nonsensical, sensationalistic, misleading and anti-scientific, and this reflects badly on any scientists using such terms uncritically.