Sign Write

The title "sign write" is as best as I can describe a situation and it has to do with an observation I noticed in a discussion forum on a deaf-related topic. There was a hearing parent (of a deaf child) who actually wrote somewhat haltingly in English as if it was done in a signing format. This hearing parent was a new member with English as the native language. So, it's not like it was a 2nd language or anything like that. I thought about using "deaf talk" but that's not right and does it reflect appropriately what I'm trying to get at here.  And so, "sign write" is as close as I can describe correctly this situation about a hearing parent. 

In later threads that parent wrote in a fashion that was grammatically smoother and stayed like that ever since. And so I have this question and I'm wondering about this. Has anyone ever witnessed anything like that before? A new hearing parent in a forum attended by mostly deaf and hard of hearing members to write English in an almost a haltingly manner like "sign write"?

I'm thinking that this parent had this misconception about the forum members' English fluency and thought it was necessary to write in such a way. Your thoughts?