Garak is the most likely out of everyone on DS9 to have a Tumblr.
It would start innocently. He would reblog fashion, books, and quotes, and make nice with people around the quadrant. Then he’d get into heated debates over literature with a user that’s “as dense as my dear lunch companion” and begin sourcing his opinions to prove that his understanding of literature is superior. Then he would start creating text post memes out of tired irritation. Then his blog would devolve into “rather flammable waste” as it grew into meme trash and other garbage and he would regret none of it.
All of this he does without revealing his face, his race, or his name. Whenever a “reblog if you were born before ___” meme comes up, he just reblogs it with a laughing gif.