It is not incorrect, and they do understand but they don't care. They have esoteric philosophical justifications that exclude some commonly used symbols while inventing never before seen ones. This is the problem with putting a tiny number of otherwise powerless people in charge things.
Maybe a few people on twitter? I've never seen it elsewhere and I barely use twitter so saying "everyone" is an exaggeration. Also, if everyone were annoyed by it, then it wouldn't be overused any more almost by definition.
They clap become clap petty clap tyrants.