Except that your data is entering your neighbour's house, using their router to access the internet.
Anyhoo, as you stated, if you do it you are breaking the law - and I quote -
"
Two people have been arrested in the UK for using another person's wireless internet access without permission. Neither was charged but both were cautioned for dishonestly obtaining electronic communications services with intent to avoid payment"
Nothing in there about cracking WEP or downloading illegal software - just
"arrested in the UK for using another person's wireless internet access without permission."
And at the bottom of the article you quoted, was the statement -
"many users are not aware that using other networks is against the law."
Not much ambiguity about that statement, methinks.....