Agreed. What you want to do is target sites where like-minded folks hang out and promote your blog there in accordance with the local culture's norms. Here, they want everything posted with no excerpting. Some other places may vehemently object to long detailed posts cluttering things up, but be tolerant of short snippets.
Follow the site owner's rules, not yielding to the self-appointed spam police amongst the other users. If they are not moderators, f*** them. You're talking to other people who might be very interested in what you have to say.
Really? Even if they are relaying the wishes of the owner?
So it's fine to go to a restaurant, drop trou and take a dump on the floor because the manager didn't tell you not to?
There are times and places where listening to your peers and fellow users is a real good thing.
Normal people know this.