I haven't encountered any issues with smart technologies yet. Last year my water meter was converted to RF. My bills have gone down since then. Supposedly it transmits usage every hour. I purchased a new Samsung 55 inch LCD last year but I avoided an additional $100+ by keeping it on the dumb side. I too have a couple other flat screens (Sony Bravias) both dumb.
Can't you simply block internet access via settings though. I know for my wireless devices, I choose to connect to my router, not the other way around.
I shudder to think of controlling my home utilities, door security, etc via a laptop or iPhone.
edit: Blocking access though would sure interfere with a person's viewing of Netflix and Hulu Plus or quick access to their Facebook via the lazyboy.