My general thoughts on Food Chain is that it isn't a card that gets 'accidentally' broken/abused. It doesn't do anything super terribad when used fairly, or even moderately, and if you're combo-ing off with it - you know exactly what you're doing. Even the most obvious uses, such as those creatures you can cast from exile - if you add that pair into your deck, you know exactly what you're doing, and what the expected result is. There's no surprises.
To that end, it's not really any worse than most other infinite mana combos, or which there are many.
If you add it into your deck, you know that whether it's there to be a quirky ramp card, or if it's there to be an infinite combo - there's not much middle ground. And if you add it as an infinite combo, there's no "oops" situation there - you know full well it will infinite, and by that point, you should know exactly where your playgroup stands on such matters.
To that end, it's not really any worse than most other infinite mana combos, or which there are many.
If you add it into your deck, you know that whether it's there to be a quirky ramp card, or if it's there to be an infinite combo - there's not much middle ground. And if you add it as an infinite combo, there's no "oops" situation there - you know full well it will infinite, and by that point, you should know exactly where your playgroup stands on such matters.
Retired EDH - Tibor and Lumia | [PR]Nemata |Ramirez dePietro | [C]Edric | Riku | Jenara | Lazav | Heliod | Daxos | Roon | Kozilek