Well, honestly, only the second response really sounded a little "off" to me. In all fairness, sometimes it is really hard to interpret "meaning" or "tone" in emails! They could have been angry, sarcastic, or a number of different emotions. I don't really think that the last email there sounded rude, or at least that is not how I would take it, but everyone is different!
See, I think we all need a variety of smiley faces so that they can help to interpret our mood!!
Cuz they could have meant:
I cannot run an ad if I do not know who you are..
or
I cannot run an ad if I do not know who you are..
or
I cannot run an ad if I do not know who you are..
I would really just try to take this one as well meaning and let it go at that. Hopefully future correspondence with this webmaster will go better!
By the way, thank you for signing up at my site!!
AND, you can edit your signature in the control panel.
Click on My Controls, and look at the list down on the left side of your screen. There is a link to "edit signature"
Good luck with your ultrasound!! It should be very exciting!!!!