Personally, I will stay far away from an iOT device unless it leaves a trail of actions upon a blockchain - but I don't know how easy it is to convince the average consumer for that need.
I imagine Ethereum contracts binding neighborhoods together with Neighborhood Watch applications. Surveillance devices could be interlinked on the blockchain, automatically encrypting and uploading data that is only available to the originator of that data or by their 'agent' who they've assigned as proxy. There could be override features built in, enabled with multi-signators. A group of neighbors needs to see my pictures (not inside my house certainly) and if they've outvoted me, perhaps they get access to pictures my camera took, but at least I'm notified of who and when access was granted.
Police, ambulance, life alert, fire departments all having signatures and perhaps a Judge who can overrule them all by power of subpoena, but in the end even the Judges actions are documented just like anyone else.
Towns and cities should not let the data collected by iOT devices flow in an unnoticed haphazard manner to the established big data farmers in raw form without influence.
A city might provide a privacy gateway, where citizens have access to bandwidth with the caveat that this gateway has byLaws written by the local community. There would be a balancing act, growing the local gateway motivated by the monetary benefits from selling big data to marketers and researchers, however the community would not want to have their byLaws so constrictive as to drive users away.
I can image a blockchain that contracts with the nearest doctor on call during a medical emergency, whose services are then logged to the blockchain, and before he's even done saving a life in the middle of the night, his shift at the hospital is replaced by another doctor who fills in for him. Don't think of working for some impersonal employer, think of the blockchain as the employer who is able to adapt to the needs of the worker in real time. It's not about profit for the blockchain it's about efficiency and whatever ethical practical byLaws we're able to encode.
I can imagine a blockchain that introduces an elderly person to a youth who is looking to pick up a couple of dollars for raking leaves, taking out the garbage, helping someone carry groceries.
Today, unlike the past, many people do not even know their neighbors and it is so sad. The blockchain could not only introduce people in need to each other on a local and neighborhood level, it could keep all interactions accountable. Perhaps there will be a day when you are not afraid to knock on your neighbors door to ask a favor, or to borrow something because reputation and honorable barter or commerce is carved into the blockchain. Kids bored and won't go outside? The blockchain locates supervised activities to keep them busy. A neighborhood bully getting out of line, the blockchain - guided by an ethics committee, social workers, police if things have gotten that far - finds some kids just about his size and provides a suitable activity that has been proven over time (etched into the blockchain) to work for all involved... so many possibilities.
Surveillance freaks people out - Ethereum can take that freak by the heels, turn him upside down and shake all the meanness out of Neighborhood Watch.
So, my question is, how would I sell the Town Council on empowering themselves, claiming their space spot in the Big Data gateway? Who would I invite? How do I convince them that they should all sign on?
I don't want to bring in the worlds largest alarm company, I want to replace them from the ground up while involving everyone in town. I see huge money coming into our digital currencies but I see the best growth at the smallest levels, everywhere.