I actually drank a little more than .5 liter of white vinegar as part of some experimentation with those "miracle fruit" tablets (https://en.wikipedia.org/wiki/Synsepalum_dulcificum). Other than a few minutes of burping, I experienced no ill effects.
Edit: Ok, wanted to make a correction after thinking more about that day: My consumed amount was likely around half that. I was consuming various other oddities during this time as well (drinking hot sauce for example) and there couldn't have been room for 16oz of just vinegar. If you've not played around with those tablets, I recommend it even if you get some stomach upset from the things you consume.
wow OK, I stand corrected. I always, wrongly assumed that more than tiny amount would make digestive system go crazy and probably cause vomit or other unpleasant consequences
To be fair, from my recollection of freshmen challenges, a cup of vinegar, a large raw onion, and a head of garlic is sufficient to either induce vomiting, or to compel the 'winner' to self-induce vomiting.
The advent of both these kind of challenges as well as Youtube have brought to light a level of durability of the human digestive tract I wouldn't have previously expected. One only needs to watch someone like skippy62able (L.A. Beast) to have their eyes opened (and possibly their gag reflex triggered). For example, witness him consuming baking soda and then drinking a glass of vinegar:
https://www.youtube.com/watch?v=3Ke1el2TsDs
Vinegar has nothing on the natural stomach acid already present in your digestive system. People don't give enough credit to how resilient the human body actually is.
I drink a lot of sour beers. The agent of souring is generally lactobacillus or pediococcus bacteria producing lactic acid. The pH of these is generally around 3, which is a little bit higher than vinegar. I've made some homebrew that is a bit lower - though it ended up being ab it too sour for my personal tastes. There have been plenty of days where I have had more than 2 liters of sour beer - many commercial bottles are sold as 750mL, and sour beers are generally relatively low alcohol %, so it's easily possible to drink plenty of these if you've decided you want to make a day of it.
About the only ill effect would be some heartburn. Tums to the rescue
I was addressing the toilet cleaning statement. How much do you need to use for that?
But ok, to make break your point I need to provide you with an example of a liquid that cleans the toilet just as well as coke but is healthy while drinking similar amounts. How about lemon juice, diluted to be drinkable without any direct adverse effects on your health and with the same pH as the coke. I'm just guessing but I think it is possible to do that.
What folks use over a salad is much more paletable - a sweet tasting weak vinegar + oil, and sometimes a touch of sugar. This doesn't make it any better or worse than sodas, simply different. There are many things we eat that aren't something we can do in really large quantities or things that can also have industrial or cleaning purposes. This doesn't make these dangerous, simply multipurpose depending on amount and strength.
Hell, you can get very sick by drinking too much water - or get too dehydrated - and can die if you try to breath it. Yet, water is pretty necessary and healthy to have.
Edit: Ok, wanted to make a correction after thinking more about that day: My consumed amount was likely around half that. I was consuming various other oddities during this time as well (drinking hot sauce for example) and there couldn't have been room for 16oz of just vinegar. If you've not played around with those tablets, I recommend it even if you get some stomach upset from the things you consume.