Are the carriers over-suppressing potential bad player calls? Probably. For sure consumer caller ID cell messages like "Telemarketer" from AT&T and "Likely Scam" from Tmobile are cutting down on call completions from marketers by the millions.
Top members at PACE (Formerly the American Teleservices Association) are quietly exploring ways to help carriers suppress bad actor solicitations more accurately. The ones that route calls all over the world and can't be caught. This includes a scheme to have call compliance service providers work directly with carriers to ensure more on-target suppression. The reason? If such low completion rates continue, this could cripple the telemarketing industry.