  We examine the overall likelihood that the consumption of a giant planet
could pollute its host star. First, we show that the detection of 6Li in SWPs
could be used to distinguish between giant planet formation theories, and can
be used to detect the consumption of giant planets independent of planet mass.
Second, we examine the probability that giant planets between 1 and 3 M_J could
be destroyed in the outer convection zone of stars slightly more massive than
the Sun, finding that heated giant planets would be efficiently destroyed near
the surface of the star, while the cores of cold giant planets may be able to
survive to the base of the star's convection zone. Third, we examine the tidal
interaction between a planet and its host star, showing that this interaction
can lead to tidal disruption of the planet and accretion of its material, or
orbital decay followed by hydrodynamical interaction. Throughout, we consider
the case of HD 82943, a star known to have two planets and having a preliminary
detection of 6Li. Using stellar models including diffusion, we estimate the
mass of the HD 82943 to be about 1.2 M_sun and its age to be about 0.5-1.5 Gyr.
The observed 7Li abundance for HD 82943 is consistent with stars of similar
T_eff and age in the open cluster NGC 752. We describe a possible dynamical
history for a hypothetical planet in the presence of the two resonant planets
currently known. (abridged)
