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 started off using a regular vape mod, but brought one of MJ's Yocan Kodos which is much better suited to the job - cheap, easy to use, and consistent (doesn't look like they're currently listed though). The key is getting a device that fires low voltages (3v or lower). The wife uses an Eleaf iStick Mini from eBay which works well for her. Hope that helps a bit :-)