<p>State Sen. John Vasconcellos, D-Santa Clara, is at it again. The same dude who, over a decade ago, established that immensely productive state task force on self-esteem, has recently joined with a group of like-minded legislators to propose giving partial votes to teen-agers. He would give 14- and 15-year-olds quarter-votes. Their 16- and 17-year-old siblings would get half-votes.</p>