Please turn on this feature!

There are threads like this one that need this option:
http://www.flyertalk.com/forum/hertz...s-only-12.html

And this one:
http://www.flyertalk.com/forum/hotel...elzoo-etc.html

We need to be able to say thank you without adding to the clutter. It will encourage more people to contribute.

And to the many who have posted in this thread it has no value to them, what harm is it? You can ignore it, and ignore it easier than all the "thank you" posts.