And you are right – we all read things from our perspective which is why I try to always read what I'm commenting several times.

I think it's tacky to delete comments (unless they're obscene or something bad). i've had it happen to me. I think it's pretty self-serving on the part of the blogger — with or without a "commenting policy."

i don't expect an e-mail about a comment deletion. it's ultimately the blogger's prerogative.

the problem with blog posts and comments — and e-mails for that matter — is that the reader is reading through their own lens. Any emotion, sarcasm, snarkiness (made that one up), conviction, passion, etc — it can all be misunderstood.