In my new life-after-SBO I do a fair amount of work as a copywriter and much of that is for private detective agencies. I can tell you that smart phones and home automation have vulnerabilities to worry about. Digital forensics people say that Android phones are quite easy to hack, iOS more difficult. But if someone has your phone for 5 minutes they can download all sort of bad stuff to spy on you. This happens most often is child custody cases where one party wants dirt on the other.
Once into a phone you can not only find email, texts, and photos, but also past GPS locations.
Home automation may even be worse, not only for surveillance but pranks. Imagine turning someone's furnace up to 85 right after they leave for work, or chilling it down to a nice toasty 50 degrees.
Of course, these guys are paid to be paranoid. That said... sleep well!