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.
Tbh I've had my fair share in buying from vendors, but if your looking for fast, discreet delivery and quality products i'd personally have to say Gods Connect. But i have also bought from NDWUK, UK420 and Pablosgreenhouse in the past and they were all great, apart from a few issues here and there. However, i'm guessing the other UK vendors are just as great and i will definitely be trying some of their products whenever possible.