ILS (LOC actually) frequencies are lower down the VHF scale, thus nearer to the FM broadcast band?
Still, nobody I have ever met has ever known of a case of actual interference. For all the grief and expense this has caused... how long has ILS and VOR been about, how long has the FM broadcast band been about? You would think that if there were any problems it would have been glaringly obvious by now. We are talking about 2-3 decades in which to demonstrate a problem.