Ah the old burning bag, who could forget. A particular favourite of mine was a variation of knock and run, where you aim the garden hose or sprinkler at the door, knock on the door like mad then turn on the hose on the way past as you run away.
It depends how serious the problem is, blocking is fine up to a point, but after that its more appropriate to break in to their house and take a dump in the shower.
Realistically, we should be trying to break the age barrier. So why not head down to the bingo hall and make somebodies granny your special friend with mothballs and benefits.
RE: In crowd
Here we all are, bagsing characters... we'll have to nominate Gilligan because nobody will volunteer.