I feel strongly about this, because as a medical researcher the results are staggering.
Gardasil only protects against certain HPV strains, not all. It has serious complications associated with it’s use, up to and including research. There is plenty of documentation to verify this. And we haven’t even gotten into the long term consequences yet, because the vaccine hasn’t been tested in the long term.
The only time Gardasil is at all useful, is if someone chooses to have sex with someone else who is already infected. The use of the vaccine should not be required for a sexually transmitted disease. If people believe that they are at risk for HPV (ie, sexually active), then they should get the vaccine.
Otherwise, do not vaccine children. The risks just aren’t worth it.
First of all, HPV infections are usually asymptomatic, so most people don't know they have them, except for those with visible genital warts. Second, 50% of women (and presumably men) are infected by one or another type of HPV within three years of becoming sexually active. If you wait until people become sexually active it may be too late. The ideal time to vaccinate is pre-teen.