Comment by jonathanstrange

A Golden Rule of the internet says that you should never reply to unwanted texts on any medium:

- stalkers and trolls live off reactions, both positive and negative ones

- spammers will use your reply to verify there's a human at the other side

- colleagues and friends will hate you because everybody thinks they're important

Replying only has negative effects. Use client-side filtering, kill files, blocking functions, or ignore the text - whichever fits best.