For me it’s by pure luck! As long as stuff doesn’t go outside the intended audience you’ll be safe! Also it’s recommended to lock things up for a little while if you have a feeling you’re going to get unwanted attention! Stf is a very small fandom too so like there’s like less of a chance to get dog piled. If you’re especially anxious you can avoid tagging things. I left things untagged in the beginning before I felt a little bolder. I wish you luck anon! I do hope to see your art one day!!