[albertgoeswoof]

Surely that applies to every API in existence, for example, on the HTTP API I'm using right now to post this comment, I know that Mozilla stores some of my data on their servers (through FF Sync), and HN know that's possible, but it's not up to HN to ensure Mozilla aren't taking that data and selling it elsewhere.

[eat_veggies]

HN didn't design the commenting API specifically for FF Sync to use though.