Messages must not harass, intimidate or threaten the recipient

This is hostility pointed at the individual holding the phone rather than at a group, and it is the shape complaints arrive in most often — the recipient reports the message because it frightened them, not because it offended them. Honest businesses land here through pressure copy and enforcement language: escalating reminders, "final warning", "we will be forced to take action", each of which reads as a threat on a small screen with no context around it. AT&T states it plainly — message content that deceives or threatens consumers is not permitted — and there is no volume threshold below which it is tolerated.