Would you consider it extrememly rude if you send a personal email to a family member, and they invariable "delete without reading, " knowing full well you'll get that message at your end?

Inspired by Daloons
http://www.fluther.com/disc/60911/does-politeness-mean-always-acknowledging-the-greeting/

I have a sister I quit even trying to make contact with, because she’s been doing that to me for years, ever since she became upset over a relatively small issue. I used to try to re-engage her by sending stories and pics about her nieces and nephews and the rest of the family, but I’d always get that message. I called her on it once, and she haughty told me (as though I were stupid) that she uses the preview pane (“ever heard of that??” she says) she can print and open attachments from there. I told her that it bothered me that she chose to take the kind of action that would send me the message. I guess she didn’t care because she continued to do it. I haven’t sent her an email in probably two years, but I actually did include her in a very important one that I sent to the entire family last week, which was of a nature such that I received condolences from everyone…..except her. “Deleted without reading.”