No, that's not at all why those programs were made.
When on the road you'll find basically three types of networks:
1) Open, free ones.
2) Open (as in non-encrypted), but you have to go through a https web page and register and pay. Common in airports (although some airports use scheme 1), which is better) and also to cover big areas of some cities.
3) Private networks. Your regular home-user, or some office's internal wi-fi network. Stay off from these. Always.

Stick with 1) and 2), and only use those mentioned tools for _legal_ security research issues. Usually 2) at least are easy to find, that it may cost money isn't a reason for cracking someone's private network.