Knitting seat warmers?

I have always wondered how some people can treat the bus like their living room. You see people sprawled out across two seats sleeping, people reading hard cover books - I know this is not so strange, but honestly is it worth carrying that heavy book for 15 minutes of reading? - people putting on make up, and as I have documented before people talking about intimate medical issues in loud voices. Today I saw a first. There were two women on the bus knitting. They had a bag full of wool and several big needles. Again I have to wonder is it worth bringing all that stuff on the bus for 15 to 20 minutes of knitting, then it hit me: maybe they're knitting a little blanket for the homeless guys fake baby.