A habit I've noticed among English-speaking Indians is ending chat sentences with "...!!!" For example: "Good morning, Bob...!!!" I would really like to know

A habit I've noticed among English-speaking Indians is ending chat sentences with "...!!!" For example: "Good morning, Bob...!!!" I would really like to know where it comes from. In my experience, they don't realize that "..." comes across as dramatic or passive-aggressive. The "!!!" part I assume is just meant to convey enthusiasm, but it comes across as very aggressive.