Membership means that the site has to commit to an industry code of practice that includes honest communication with users, protecting their privacy and providing a mechanism for reporting abuse.
Inclusion of the ODA's logo on the site indicates membership.
But the fear that online dating is changing us, collectively, that it's creating unhealthy habits and preferences that aren't in our best interests, is being driven more by paranoia than it is by actual facts.
"There are a lot of theories out there about how online dating is bad for us," Michael Rosenfeld, a sociologist at Stanford who has been conducting a long-running study of online dating, told me the other day.
In fact, research shows that more than 40 million Americans (40 percent of all singles) use online dating services.
However, there are exceptions, and you need to be aware of how to keep yourself - and your bank account and savings - protected while meeting people online.
Is it creating a new reality in which people actively avoid real-life interactions?
Of course, others have worried about these sorts of questions before.
These days you're in the minority if you don't know at least one person who met their current husband, wife or partner on an online dating site.
According to a recent survey, one in five people in a new committed relationship and one in six couples married during the last three years met their significant other using an online dating service.
No longer embarrassing or, God forbid, cringe-worthy, half of all single people now use online dating sites to find love. There are literally hundreds of dating sites out there. The experts say: This is a great site for those who are looking for personality matching.