The problem with age, unlike gender, is a lot of benefits go along with it.
So personally, I would sue to legally change my age to 67 and start collecting Medicare and full Social Security. Ka Ching.
Lots of 18-year-olds will change their age to 21.
Currently it's common in American households for wealthy people who want to give more to a candidate than campaign finance law allows to donate in the name of their children. They could legally change the age of their kids to 18 and hope to convince them to vote like dad does - Littleman, if this succeeds and you can keep those unruly daughters in line, you could get five votes.