No. Science is a tool; and a very useful one. It's given us vaccines for diseases, electronics, essentially every form of modern communication and so on. It's not a life style. It's not going to touch on subjects like spirituality, the core belief in God, etc. Some people take it too far, but most atheists? No.
Science could become an ideology if science were theoretically accepted as fundamentally true and inherently good. Though this is an extreme statement, this concept isn't a polar one. The more one associates science with truth and benefit, the more one's world view will be influenced by science, as if it were a belief system.
Just from your given examples: I believe vaccines have had unintended and harmful consequences for the neurological health of developing minds (thimerosal used as a preservative in vaccines) and that there are inherent risks to the development of electronics and communication devices (the unknown effects of wireless data transmission and the ever increasing surveillance network in the UK).
We are no longer in "the Year of our Lord", but the "Year of our Ford."
I know a lot of atheists, including my entire immediate family and most of my aunts/uncles. Guess how many are in a club like that? Zero.
Cool, and I said I know a lot of people who are. The point is moot. Some people do, some don't. I was simply suggesting that there is a large population of atheists at Penn State who appreciate being around like-minded people, encourage others to understand their point of view, and want to convince others to share their world view.
This behavior seems like the behavior of a minor religious faction to me.
Here you go again with the use of "they." There are no atheist ceremonies. Yes, some atheists take part in ceremonies but not nearly all do, and the ceremonies that do exist vary widely from person to person.
I'll admit, my use of the word "they" sounds a bit accusatory, but don't try to twist my words into some anti-semitic hogwash. I was using the word "they" as a pronoun for a group of people. And yes, individual behavior varies inherently. But I don't see how it takes any credence from my point.
Some ISKCON Hindus become devotees to a spiritual master, while others own houses and merely live according to the theology. Some Catholics don't go to confession. Some muslim's eat during daylight within Ramadan. That doesn't mean that disciplic succession, confession, and spiritual holidays aren't inherently related to their culture of origin, simply because some members of said culture are nonpracticing.
De-baptism is an atheist ceremony. It has it's foundations in atheist theology.
This is an invalid generalization. You're generalizing the activities from a small subset to the entire group.
I apologize, but in my opinion Atheism is a fledgling religion and it will continue to take on more and more characteristics of religion as time goes on, under the guise of satire.
One belief =/= a set of beliefs.
No practices "generally agreed upon."
You could debate that the one belief is not even specific. Here, I'll give you a number of beliefs from people I know who call themselves atheists.
1. There is no god and the entire concept is logically incoherent.
2. There is no god and I can prove it (but the concept is logically sound).
3. There is no god and I can't prove it.
4. There is no god, but there are immortal souls and hence an afterlife.
5. There is no god, but I am spiritual.
6. There is no god, and I am not spiritual.
Yup and some theists are fundamentalists whose beliefs strictly adhere to the religious scripture, while others can take more general and open minded approaches to the faith. Nothing new.