"Product pivoted to recommending allowing 18-20 year olds to message unconnected minors if the age gap is <2 years after learning that blocking threads from 18-20 year olds to teens would impact 7.7% of threads to teens."

Leah ████: "Product pivoted to recommending allowing 18-20 year olds to message unconnected minors if the age gap is <2 years after learning that blocking threads from 18-20 year olds to teens would impact 7.7% of threads to teens." "Data shows blocking threads from 18-20 year olds to teens would capture .68M daily new potentially harmful threads. Harmful threads are based on MaCSA scores, negative feedback from minors, CSE reports including sextortion, etc." Leah ████: "MWB has scoped 3 options, each of which has voice (i.e., new threads blocked) and safety (i.e., potentially harmful threads prevented) impacts: • Option 1: Prevent 18+ year olds from messaging people aged 17 and below who don't follow them ◦ Blocks 2.9M new threads daily ◦ Prevents 680,000 potentially harmful threads each day • Option 2: Allow 18 year olds to message teens who do not follow them only if age gap <= 1 years ◦ Blocks 1.9M threads daily ◦ Prevents 440,000 potentially harmful threads each day • Option 3: Allow 18-19 year olds to message teens who do not follow them only if age gap <= 2 years ◦ Blocks 1.5M threads daily ◦ Prevents 360,000 potentially harmful threads each day" "MWB believes that the disparate safety impact between Options 1 and 2—240,000 additional potentially harmful threads each day—can be largely mitigated in H2, but we haven't seen data on those mitigations."