Dating Apps: Do you answer to "Hey" messages?

I love how OkCupid lets you know that someone liked you and sent you a massage and the app makes it look like your life is going to get turned upside down and then you open it and find this:

(Sorry for the censorship, I didn't want to put his identity here - that includes the eyes, though his expression wasn't that much different)

Sometimes, when I'm in a good mood I like to answer the "Hey" message and parrot them until they ask a question, so it goes like

"Hey"

"Hey"

"How's it going?"

"Good. Thanks and you?"