Your 15 year-old statement for automotive defects is incorrect. From http://www.enotes.com/everyday-law-encyclopedia/recalls-by-manufacturers:

There are a few restrictions on consumers' rights to take advantage of recalls. For example, there is a limitation regarding the age of the vehicle. In order to be eligible for free repairs, refund, or replacement, the vehicle must be less than 8 years old on the date the defect.

So you'll be notified...but it'll be up to you to fix it out of your own pocket after that. The equivalent here would be that you'd have to buy a new OS. Besides you're comparing safety recalls, which can cause death, to a software "bug" that is actually caused by the user themselves. Also your statement about "free software getting patched seemingly forever" is totally false, incorrect, and missleading. There are tons of free software that is unsafe and no longer being maintained or patched. Does that sound like fraud too? No...more like the EoL of software (that sounds familiar...)

We have about 400+ workstations with various OSs (Win 2000, XP, Vista, 7) and 20+ servers with various server OSs (Win Server 2000, 2003, 2008) and we only have the System Admin and a "sneaker tech". Oh and we have a remote location as well which they must deal with on the other coast of the US. At least from my viewpoint, your situation is not unusual.

Forgot to mention that yes there is no pre-set phone list to block but you can set it to only answer calls on the list or start adding numbers easily to the blocked list as they come in. A simple right-click and block option is all it takes :)