we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
I just use a 10mm adapter. Dynavap fits into the 10mm end and then the other end is 14mm and goes into my bong. I think the newer version fits a bit better but mine works fine. Alternatively you can buy some silicone adapter→