essxjay -- I'm with you. The tags are indeed fragile...

My first one was torn in half as I lifted my laptop case from under the seat in front of me. It merely snagged between the tray-table and the seat pocket (for all of a milli-second). Next thing I noticed was my business card floating to the ground. Most other tags I've had can withstand some pretty harsh treatment; but these sure can't!

Nevertheless, I enjoy having it on my bag, just in case I happen to run into a fellow flyertalker!

By the way, here's a few more discussion threads on the topic:
http://www.flyertalk.com/forum/Forum95/HTML/000534.html
http://www.flyertalk.com/forum/Forum95/HTML/000355.html