If I don't want them knowing I surfed to somewebsite.com, why would I want them to know that I actually logged in to someotherwebsite.com? I get that people ha

If I don't want them knowing I surfed to somewebsite.com, why would I want them to know that I actually logged in to someotherwebsite.com? I get that people have different levels of trust for these services than I do. I'm just more cynical than most, I guess.