With this issue of telling people we are fasting I don't! I try not to arrange meals for fast days. If I cannot get out of it I say I am not hungry which is always accepted. If it is a meal away from home on a fast day I keep it light. It is strange how it is ok to not feel hungry but brings endless unwanted advice if I say I am fasting!
Happy fasting, remember we have found the Holy Grail!