could be used to ground unwanted harmonics as a switch debouncer
Strat pickups usually have a DC resistance of about 7k. a simple low pass RC filter with 7kOhms and .001uF has a -3dB rolloff of about 23kHz.
This takes away harmonics that are well beyond the range of human hearing. This could serve to mitigate feedback problems common in single coil pickups and lower the noise floor of your signal. All good things in my books!