At this point they're basically harassing you
Honestly, you should just tell them "don't talk to me" and if they persist you have full right to report them for harassment
I USED TO HAVE A NON BINARY FLAG ON MY CHROMEBOOK, THEN THIS ANNOYING MFER WENT "IS THAT THE LAKERS FLAG?!" AND WENT I SAID "NO, ITS THE NON BINARY FLAG", HE SAID, "ALRIGHT (F-SLUR) WHAT EVER."; SOOO, FUN THING HAPPENED IN FIRST PERIOD; LIKE, THE AUDACITY OF THIS B!TCH!