The main distribution should include an upload user pic feature.
Currently, my users are doing what you suggest... attaching their avatar/pics to messages... but this creates problems. For example, a month ago the moderators of one of the categories deleted many threads... it was clean up time. As a result, most of the users pics had been deleted, and their posts were quite ugly, with broken profile images. Little by little they are changing them, but this is not the best method. Its the only way right now, but it is not the best method. Hopefully we will get a feature for this.
As you see by my reply, yes, attachments are deleted when the posts are deleted.
In the wwwthreads boards we have never had any real problems with our pics... I guess that might be a reason Rick never gave priority to this feature (though I´d bet its in his todo list), he never got to see any real problems because those who use these boards (these right here) are all web designers, webmasters, etc., and we all have where to upload. But our users dont.
Anyway... there are so many features we ask Rick for... poor Rick! haha []
https://www.ubbdev.com/threads/php/images/icons/laugh.gif[/]