It is true that the State (actually, everybody) should protect the youth from moral and spiritual degradation.
As such we have the minimum drinking age law, laws that prevent them from being jailed and institutions that offer counseling to victims of abuse to prevent a downhill spiral to becoming sociopaths. The COMELEC, however; seems to have forgotten to check the definition of the words "moral" and "spiritual." They should realize that moral, spiritual and religious are not synonyms. Nor is it right (in every sense of the word) to use Catholic and Islamic doctrine to justify their claim that LGBTs can cause moral degradation. The scientist in me is shouting that they should have atleast cited a study wherein children raised by homosexual couples are more immoral (or atleast exhibit deviant behavior) than conventionally raised children. They could also show that schools who accept LGBT teachers have higher rates of juvenile delinquency. Raising the Bible and Qu'ran just doesn't cut it. They may offend you but that doesn't mean it is immoral. Bad breath is offensive but it is certainly not immoral. And they shouldn't even dare to claim the homosexuality is a transmittable disease because its not. It is not a disease period.

Returning to morality and spirituality, the government being a secular institution (we are not in the Unitied Catholic and Muslim States of the Philippines, right?) should use secular ethics and principles or at the very least use it in adjunct to their arguments citing dominant religious ethics. They should allow for an environment where the youth are allowed to make their own decisions. They shouldn't be an environment censored and controlled by the ruling class. The COMELEC has no right to impose their beliefs on everyone especially if those beliefs can only be supported using supernatural beings and religious texts.

Let us expand their argument a bit to LGBTs are harmful to the youth. As far as the current evidence shows, LGBTs are not a separate human species which can carry but not be harmed by diseases that can kill the youth. They are equally capable of gaining and sharing skills and knowledge. They are equally capable of contributing to society. Nor are they the sole carriers of the sins of society such as alcoholism and polygamous relationships because straight people are capable of those things and may even exhibit them at proportions greater than the LGBT. It bothers me that the only harm I could think of is the nauseated feeling some homophobic people get from seeing LGBT couples... wait, seeing LGBT people just breathing make them sick. Unless this brand of nausea has caused massive deaths and disabilities or calamities the level of Ondoy, I see no reason to mark the LGBT as a harmful agent (in terms of health and morals) to society thus the youth shouldn't even be protected from them.