Linear AQ, the best method would be to resume posting and stick with the subject or cease posting. Already on here I have had to remove a few posts.
Ok. This is simply the first time this has happened to me.
Perhaps, instead of removing the post, the poster could be given a warning and if the post is too far off topic the warning could include a reminder for other posters to refrain from replying to that post.
If the poster continues to ignore warnings you could invoke a suspension for a day, a week....or whatever.
If people ignore the warning to refrain from replying, then they could be suspended also.
That way the posts won't be removed and others can follow what's going on.
Just a suggestion.
BTW: When I wrote a private message back to CTD, asking about the post removal, he was on line. I didn't know he was not going to be around for a few days.