I'm slightly more southern than you are, though I certainly don't like pecan pie either (way too sweet for me). And pickle juice on popcorn? WTH? But we do like to put apple cider vinegar on the french fries we get at the MD and DE beaches, which probably sounds just as weird...
You checked 11 out of 72 on this list!
Sorry Yankee — looks like you’ve gotta get yourself to Dixie land and try some REAL pecan pie! You need a little southern comfort in your life!
BBM I remember malt vinegar on fries in Cape Cod and when we went to the Jersey shore-
boardwalk fries- that are sold at beach areas of NJ, so I don't think it's weird to put vinegar on fries.
Link:
http://tsgcookin.com/wp-content/uploads/2012/12/Malt+Vinegar+Oven+Fries+526.jpg
Everything you would want to know (or not :facepalm

about vinegar and fried potatoes:
Vinegar
"...Vinegar intensifies the flavour of foods without dominating their natural goodness and taste sensations..."
http://reinhartfoods.com/vinegar-info-2/#vin-history
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French fries
"...French fries are served hot, either soft or crispy, and generally eaten as part of lunch or dinner, or on their own as a snack, and they commonly appear on the menus of fast food restaurants. French fries are generally salted and are often served with ketchup; in many countries they are topped instead with other condiments or toppings, including vinegar, mayonnaise, or other local specialties...
It is claimed that fries originated in Belgium, and that the ongoing dispute between the French and Belgians about where they were invented is highly contentious, with both countries claiming ownership...
Accompaniments
Fries tend to be served with a variety of accompaniments, such as salt and vinegar (malt, balsamic or white), pepper, grated cheese, melted cheese, mushy peas, heated curry sauce, curry ketchup (mildly spiced mix of the former), hot sauce, relish, mustard, mayonnaise, bearnaise sauce, tartar sauce, chili, tzatziki, feta cheese, garlic sauce, fry sauce, butter, sour cream, ranch dressing, barbecue sauce, gravy, honey, aioli, brown sauce, ketchup, lemon juice, piccalilli, pickled cucumber, pickled gherkins, pickled onions or pickled eggs.."
https://en.wikipedia.org/wiki/French_fries
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And these article:
THE HISTORY OF FRENCH FRIES
http://www.todayifoundout.com/index.php/2010/09/the-history-of-french-fries/
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List of accompaniments to french fries
https://en.wikipedia.org/wiki/List_of_accompaniments_to_french_fries
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There seems to be no documentation of when chips and vinegar were first combined, but it was likely very soon after the chip was invented, since vinegar and salt were widely used as a condiment/seasoning long before then. Whether the first use of vinegar on chips was alone or from a pickled egg jar, we will likely never know. But, however, that the main users of vinegar on chips (Britain) often use malt vinegar, which would not have been used to pickle eggs. Also, eggs are pickled in brine (salt water) with added vinegar, sugar, and other ingredients.
But read this about the use of
Non-brewed condiment: (used to cater to Temperance types who wanted nothing to do with the alcoholic sources of genuine vinegar)
https://en.wikipedia.org/wiki/Non-brewed_condiment
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"(British) a cheap alternative to malt vinegar made from industrial acetic acid flavoured with caramel; found especially in fish and chips shops"
http://www.allwords.com/word-non+brewed+condiment.html
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Could be that it became easier to use malt vinegar instead of home-made non-brewed condiment?? :thinking:
And here is a recipe for
boardwalk french fries from Maryland that uses vinegar: (just in case you wanted one :facepalm

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Thrasher’s French Fries at Home
http://blog.streaminggourmet.com/20...he-boardwalk-my-attempt-to-make-them-at-home/
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And one more recipe (because, of course :facepalm

:
New Jersey Boardwalk Fries
"Nothin' says summer like some fresh, hot, salty french fries drenched in vinegar. A boardwalk treat."
http://www.food.com/recipe/new-jersey-boardwalk-fries-114708
(scroll down on the NJ article and take a look at the NJ crumbcake- I love a good crumbcake with lots of big crumbs :heartbeat
OOH- I'm getting hungry now
:floorlaugh::floorlaugh::floorlaugh: