No, it is not considered going over the line, because there is no line.
Experience has shown that contacting submitters is, more often than not, a terrible mistake. Mail bombs, physical and legal threats, stalkings, etc. are all things that editors have experienced.
Not to say that we do not contact submitters, I've even been stupid enough to call some when it was a simple matter of trying to verify if someone actually had a storefront -- and have learned not to do that again.
It is also, counterproductive from this perspective. If I were to send you an e-mail telling you that I just listed the site, I've:
-- suggested that we are some sort of listing service
-- made public which editor edits which site, which is no one's business
-- suggested to you that if you don't like the title/description/category, then you know who to go complain to/about.
Bad, bad, idea because there is nothing but downside for me. Contacting you does nothing to make me a better editor, or more productive. It only makes me more vulnerable to abuse or attempted bribery. Not good at all.