libraaudio, the press wouldn't be interested unless it involved:
a family/group eating in the restaurant with a severely disabled person unable to eat the food on offer;
a baby needing to eat the home made baby food parents brought along because baby has severe allergies or there is no baby food on offer;
any other tragic, heart pull scenario you can think of.
The popular press might take a mocking line in respect of the non-customer taking advantage. I can see the headline - Cheeky diner ejected from restaurant for bringing his own picnic.