I have got there in 5 cars,from the begining not making the distance longer than 10 kilometers with each of them.
After this I caught my last ride directly to Mar del Plata and had a really nice discussion with 11 year old girl about spiritualism and the ghoasts :)
And yeah,the people as well when they stop behind and u want to go to talk,get paranoid and dont talk to u,or even refuse to open the window,staring at u scared to death, or when they get out they use to lie. But somehow used for this reaction from south of Brazil a bit (even though that is not that strongly paranoid one) and for another one from Europe... So nothing new in the world :)