Yes i`ve had that experience and when I think about it to be honest I think I`ve been guilty of it myself.
I don`t believe it`s anything malicious on anyone`s part ,hell ,it`s hard enough keeping in touch with people we physically know let alone people in cyber space / internet people we have never met.
however I do think maybe we should be a bit more attune to it ,as it can come across as rude or worse.
And I take it you are talking about PM`s ?
I don`t take it personal , and lets face it we cant please everyone in what we say or do .