I'd like to think that almost all of us are mature adults and can put aside our differences of opinion on which belief system(s) are right or wrong.
I know quite a few have embraced another belief system after leaving the JWs, and if it works for them and their spirituality as individuals, I have no issue with it unless they use that point of view to denigrate others or if they find others somehow deficient for not believing the same as they do.
That goes the same with atheism. I don't see people shoving atheism down others' throats - only perhaps challenging the theist point of view. That does not constitute an attack, particularly if it is done politely and respectfully. I've also seen atheists who parody the theist point of view - and this again, does not constitute an attack on Christianity or any other belief system.
Provided that people are generally nice and respectful of each other, why should atheists be quiet about their beliefs (or lack thereof)? Are atheists really so offensive to Christian sensibilities? Puhlease!! Have you ever considered that every time a Christian says they are going to pray for an atheist, that it is offensive to them? It's as rude to the atheist as it would be for the Satanist to say they are going to offer a sacrificial goat on the Christian's behalf.
As an atheist/humanist myself, I think that almost all people generally strive to be good. I think that all people do the best they can, with the information/knowledge they have, within the limits of their circumstances. I don't believe that people need god in order to be good, moral or ethical people. I find that "godly" people who live their life being good in order to bribe a heavenly reward from god, is quite a selfish outlook. I want to be a good person just because it's the right thing to do; I don't need a reward from god or approval from god. How we got here is in the past. Where we are going is in the future. Both are beyond my control, so I don't waste time or gray matter worrying about it. I know what I can control and I know how I can be a positive influence to others without bringing god into the picture. If you can find anything wrong with those things and wish to waste your precious time analyzing the "wrongness" of my life, go right ahead. It's not going to change the way I live my life one bit.