It's gross even thinking about ugly people having sex, but it's worse that they procreate. Ugly people should not be allowed to have kids. Not only because we don't want more ugly people on the planet, but because people don't like them anyway. People are rude to ugly people (which is good) and hate them and make fun of them, and every ugly person knows it. They are miserable and bitter. Why should they be allowed to create another human being to go through life the way they have? They should know from experience that their child won't be liked. No parent want to see their kid suffer so why should an ugly person continue the cycle? Just stop them from creating and then the world will be filled with beautiful people.
Just because you and others don't want to see ugly people does not mean that they should be deprived of their lives. And there are beautiful people who are nice to ugly people. And even if you were right and all beautiful people hate ugly people, ugly people can still interact with each other.
Ugly people have it tougher in life, that is true. However, their lives are far from miserable. They can sill live fulfilling lives with friends and family and do the things they love doing.
Oh, and not letting ugly people have sex and have children makes their lives even worse. So if their lives are as terrible as you say, then letting them have sex and children would help them feel better.
If they have kids, then they are putting their child through what they go through in life. If they aren't happy with their lives, then why should they want to put their kids through that. No parent wants their child to suffer, and they are setting their kids just for that just for having the kid on the first place. If ugly and ugly have a kid it will also come out ugly. In HIgh School that kid will be bullied, and never asked out except as a joke. So no they shouldn't have kids.
No one likes ugly people. No one. Not even ugly people.
As I said, ugly people still live happy, fulfilling lives. Do you seriously believe every ugly person lives a depressing life? There is more to humanity than looks. Humans have a higher understanding than all other animals and can derive enjoyment from having pleasant or engaging conversations with people, regardless of their physical appearances. They also enjoy doing activities. Not every ugly kid is bullied and I'm sure ugly people are asked out seriously. And even if an ugly kid is bullied or doesn't get asked out in high school, that doesn't destroy his life. On the other hand, discriminatory laws that ban ugly people from having sex and children would do much more damage to their well beings.
You say that no one likes ugly people. Well first of all, I have no problems liking ugly people. I'm sure many others feel the same way. Secondly, how do you explain the many ugly people who are together and live happy lives? Have you not also seen ugly people getting together with more beautiful people? It's not impossible. How do you explain that?
Not letting ugly people have sex is a breach of their liberties. Bringing an ugly person into this world is not setting him or her up for a miserable life necessarily. I don't deny that life is harder for ugly people. But what's worse, having ugly people who have more difficult, yet still fulfilling lives, or denying ugly people from exercising one of their most basic and important life functions? I think the latter is worse.