It's acts like this that illustrate the need for ever constant changing of passwords. Restaurants and other establishments provide wi-fi as a courtesy to their clientele, and you are circumventing that. It should be the choice of the establishment who they give those passwords out to.

While you're at it, why don't you let people know your home network password, so people walking near your house can use your wireless.

I would encourage the administrators of this site to take down this post.