ya, Yo2020 got the more refined answer to your 1st
question.
Originally posted by Theatre Of Dreams:
recently i when thailand and noticed a phenomenon. at siam square
they have those diagonal vertical parking. when there's no more
space, cars tend to park parallel just behind these diagonally
parked cars, hence obstructing them. but, all these cars have their
handbrakes off and their gears at N, so that their car can be
shifted whenever the car they're blocking is leaving. 
Hey i think i saw something similar in Europe, i think England,
or was it Aussie? LOL forgot
They park along the
side of the road and leave the gear in Neutral so that more cars
can squeeze into that stretch of road. The cars will gently 'push'
the other cars to get out/in. very weird and co-operative spirit i
must say!
And for those who think that people cant tow ur car if u put brakes
on, juz a question for u - let's say u dont pay your monthly
instalments and the bank ask the tow-er to tow away your car - how
do u think they did it? Remember, you got your brakes on...
