Without the many limitations, defenses, and exceptions included in copyright law, it would prevent reasonable educational uses, commentary, and most importantly free speech.
There are some who would say yes and there are some who would say no.
Generally, the text on a bumper sticker would be too short to qualify for copyright protection.
yes
The year of the encyclopedia is the year of the copyright; there are far too many editions to answer this question directly.
The restrictive label for picnic would be "consumption break" or "in-transit meal."
depends on what you think being rescrictive is.
The Zone Diet seems to be very restrictive in the types of food choices you have. As well as the limited choices of foods they tend to be restrictive about the times inwhich the meals are eaten.
Too restrictive
No; names are too short to qualify for copyright protection. They may however have trademark their name, which would require you to get a license; if an endorsement is implied, that would also require permission.
You would need to negotiate with the entity that recorded the restrictive covenant. Until you do you are subject to the restrictive covenants.
A spirogram of a person with restrictive lung disease would show reduced VC, TLC, FRC, and RV.
A corporate entity would not have a copyright date.