the only real solution to this is good insurance and good luck.
Wholesale information theft is another level. Someone in a different state or country has access not only to me, but potentially hundreds of people's details, without ever leaving their home. And then they can leverage a whole community that is doing the same. This is how "The Fappening" occurred. This sort of crowdsourced stalking would be impossible pre-internet.
Obviously there are other reasons to worry about webcam access, but "they could spy on me to set up a robbery" is exceedingly low on my list since it just recreates a pattern that doesn't involve a computer.
For the slightly more technical, you've got frameworks like metasploit which can perform network attacks, but even that is getting much more like a kit these days. Port scan for services, fingerprint them, check database for known vulnerabilities, automatically attempt to exploit known vulnerabilities, deploy payload (the trojan).
Once you've been convicted of something, or even arrested really, you have few legal options to support yourself.
I think a substantial share of those drug dealers who aren't working formal-economy jobs as well are also drug addicts that would not be able to keep such jobs particularly well even if they weren't drug dealers, and/or convicts that wouldn't be likely to be offered such jobs if they chose to pursue them.
A hypothetical, ruthless hacker manages to install malware on a person's computer. Hell they could target certain zip codes. All the information is on the Internet. Hell, they could get a picture of your home. (By the way, Google will blure out you home, if you ask. It tends to reappear, although they claim its permanent. If your house has been sold recently, a thief/criminal has easy access to interior layout through Zillow, and the like.)
They watch you through your cams. A lot can be deduced with that information--valuable information that could be sold.
Maybe I've watched too many movies, or crime shows, but I just picture certain questions being asked, "Does the home look like its worth robbing?" "Are there hostages we could take?" "What times do they leave, we need to install our cams because they might find our malware?" "Do they have a safe, or do they seem like they have money/valuables in the house, bedroom?" "Are they doing anything illegial themselfs?" They could develop psychological profiles for people?
I hate to think like this, but certain people think nothing of doing some horrid crimes. A hacker overseas gains some valuable information, and makes a phone call to the Triads, or Russian mob? Your life becomes a statistic.
It sounds far fetched, but just what if? (And am I going to cover my cams? No, because I don't have a life, and I'm poor.)