Disadvantages

Introducing a new technology is in the benefits of almost everyone. It was previously mentioned that early adopters are the ones who "jump" blindfolded into buying these new devices at any cost. Contradictorily, a percentage of the population (laggards) have no interest in decent inventions. Theses laggards for most, do not believe in development of technology. If any of these laggards end up buying a "smart dust" devices it would have been at a good deal (low cost).

The main product disadvantage is the high cost at creation. The majority of the population will wait for a price decrease before considering the purchase and this can from months to several years depending on the product. On top of its costly price, personal privacy will be revealed and could cause problems for certain people. Privacy at work or anywhere is important to workers and people. Having to break people privacy can lead to unwanted behaviors. Some workers wont show up to work in order to avoid being discovered by other workers.

http://smarterthandust.blogspot.com/2008/11/disadvantages-of-smartdust.html
http://www.computerworld.com/s/article/79572/Smart_Dust?taxonomyId=15&pageNumber=1