The whole point of these discussions is to make languages fun. I've been studying them for my entire life and have a few under my belt. If they hadn't have been taught in a fun environment, I wouldn't have bothered. Deleting comments makes this not fun. Go and see the Danish or the German module forums for examples. A lot of people will be turned off, which is a shame as I've always wanted to learn Latin.
The theatrical pronunciation here is fun, sure. However, the "r" in "pater" should be audibly pronounced as a rolled tongue "r". It has been cut off a bit
How would you say "You are not a father"; "You are no father" in Latin?
I translated "Tu non es pater" as "You are not a father" and it was accepted. Latin does not have the definite or the indefinite article. Most of these sentences can be translated either way.
In Finnish we don't have articles either so I can say that it doesn't really cause any problems like you might think. If we would want to say that you are not someone's father in particular, we would just clarify who's father, but without clarification it works as a general statement.