re: A&M people wearing their college rings is so strange

The stole the "ring knocking" from West Point where the tradition dates back to the 1800s, its a military thing.

"The term "ringknocker" refers to the alleged custom of some West Point graduates to gently rap their ring against a hard surface in social situations; this serves as an unobtrusive signal of their status to any other graduates in the vicinity. However, a negative social-networking connotation also associates with the term, in that the term "implies that if there is a discussion in progress, the senior West Pointer need only knock his large ring on the table and all Pointers present are obliged to rally to his point of view."