This is why software like Netcam Studio is so important.
The foscam hardware is pretty good in fairness, and is good value, but this is because they are doing the bare minimum (and less than that) with regards the software. ActiveX controls, dodgy android apps, random pings to foreign servers, constant advertising of cloud storage for their app, etc
I have an outdoor foscam camera and I haven't logged into the interface in more than a year. I set it to switch on IR automatically, disabled all UPnP, P2P and other features, and that's it. As a dumb feed it is great. I hope I have myself covered in this regard.
I've a wansview indoor cam as well which I suspect is as shady as the foscam. Again, all features disabled other than providing a feed.