@dudewithsign is a popular Instagram account that features a tall man in sunglasses holding up a cardboard sign in various public places. Except instead of a serious protest message, the sign has a funny aphorism about modern life, like “Who TF is writing Yelp reviews” or “You can cold plunge without telling everyone.” The eponymous dude is Seth Phillips, an employee of Jerry Media, a social media marketing agency founded by Elliot Tebele of the popular Instagram meme account @fuckjerry. Tebele originally came up with the concept of holding up a protest sign with a funny phrase, but only made a few Instagram posts using it. Later on, Phillips reinvigorated the idea and it caught on — the Instagram account now has 8 million followers and does advertisements for brands such as Wingstop, CVS, Dunkin’, and more in which he holds up funny signs related to the brand or product (BuzzFeed once hired Phillips to hold up a custom sign at an event).…