[troydavis]

I’ve wondered the same thing. I’ve used 7726 to report large, long-lived campaigns (to AT&T Mobile’s 7726) and as far as I could tell, nothing happened. The senders rotate TNs so often that AT&T would either need to track it back to the point of ingress or do content-aware blocking.

[aendruk]

My most recent experience was enduring several weeks of daily spam, all diligently forwarded to 7726 (“Thank you for reporting SPAM. We'll take it from here.”), only to finally get fed up enough to send a complaint to the FCC after which the spam stopped immediately.