i don't believe it is forbidden so why not eat at the tables ?? Also i havent seen any player complaining about this at a table , at least not at any video , stream of a live poker tourney or cash game . I have seen cash games where great well known players or pros eat then play then chat , and noone complaints . Also at tourneys the same
Tourneys last far too long , the break might not be enough for some people . A snack might be needed , why cant he have one when he wants . you can impose some other rules , oh how to eat at the tables , what precautions to take so as not to create any problems , to keep clean your hands as much as possible , decks of cards change every some time , so i guess eating at the tables , if it is done with a respectful way , then it causes no harm to anyone .