Hi, many thanks for the suggestions.
There's been a few notable events recently, and I like to keep important news up for a couple of weeks.
I've now cleaned up those that are no longer relevant however. So this should no longer be as problematic.
I think the general Welcome and Rules posts are always going to be relevant to new users, however I would like to be able to get rid of them for older users.
I may have a look into a solution that will allow me to do this. But, not sure how successful I'll be on that front!