Sometimes when quoting articles or posts from social media that include grammatical errors the best thing to do so that people know that it was originally posted with those grammar errors and not your fault is to put the the term "(SIC)" at the end of the quote.
What does "(SIC)" mean exactly? It means the text was reproduced as it was written by the source. So if you wrote something with a grammatical error and I wanted to quote it in an article I'm writing, I'd put (sic) to note that the error was yours, not mine.
As it says on Wikipedia:
"The Latin adverb sic ("thus"; in full: sic erat scriptum, "thus was it written") added immediately after a quoted word or phrase (or a longer piece of text), indicates that the quoted words have been transcribed exactly as spelled or presented in the original source, complete with any erroneous spelling or other presentation."