Tall, Aldaba is a good place to look.
In many places (though not in the DR) it's against the law to discriminate based on age when recruiting for a job position.
In practice though, you can work out a person's age even when they don't have to state their birthdate on their CV or the job application form. In the section where they enter details about education they have to specify the dates they attended secondary school and university. That usually gives away the person's age. Or, and this applies to the UK only, saying you have 'O' level qualifications (as opposed to GCSEs, which were introduced in the late 80s IIRC) is a dead giveaway and puts you in the 35+ category, and vice-versa.
Some people don't even put their first name, or title (unless it's a professional one like Dr.) so that their gender is not obvious.
I vote for stating your starsign, colour of underpants, dietary preferences, sexual orientation...
I'll shut up now. :speechles