Was that aimed at the OP or at me? If at me, I'm aware what it means. But the phrase "steal a ride" still doesn't work in BrE, because we don't use the word "ride" at all in connection with the underground.
The only expression I can think of is "fare dodge". The people who jump over the barriers and avoid paying are "fare dodgers". I should have pointed out that not only do we not use the word "ride" in this context, but we don't use the word "steal" in it either.