Hi Mr. Mosquito. I work in high tech. I have another option for you besides legislation.
You could require it to be sold with a monitoring and service package, similar to the way home monitoring devices are sold. You could probably license your product to ADT or a similar type of security monitoring company. That way, you can qualify your customers and ensure that the product is being used properly and that devices are always in service. A lot of high tech products are sold this way, particularly ones aimed at businesses.
Generally the way these service packages are structured, there is a basic level, which is for every purchase - say $100/year.
Then there will be a Silver and Gold level for, say, $200 and $300 where there are more services provided - for example, if you purchase the Gold level of service you will automatically be upgraded to the latest, greatest system each time its upgraded.
I understand you are a small business person, but for a lot of companies, these service packages are how they make their money. The device itself is a loss leader.
I also think that the concerns that have been raised here should be addressed through some testing. For example, I have a four year old nonverbal autistic niece; I wonder how she might be affected by a system like this. Even simpler than the blinking light to warn off people who might be affected would be a yard sign, similar to what the security device people use, that states the hours the system is in use, lists sensitive people who should avoid the area, and includes a 24 hour service number.