about the spamming blank character/symbol

there's no need to be scared lol, it's just a common character/symbol.

The Braille pattern dots-0 ( ⠀ ), also called a blank Braille pattern, is a 6-dot or 8-dot braille cell with no dots raised. It is represented by the Unicode code point U+2800, and in Braille ASCII with a space.

(they are probably a new troll)