Why do people insist on flagging the crap out of the backcountry with all manner of random flagging tape? Do you like creating an eyesore?
... and please don't tell us you're doing this as some kind of public service because "someone might follow our *route*"...
Main reason for the flagging: not to get lost if we had to retrace our steps. There are numerous reasons why having a marked route is a good idea, can't really be bothered commenting on it further.