Why not pick one of their stories as a favourite.
That way you can find them for their stories.
Go into settings, allow only friends to poke.
Then delete them.
Of all our inventions for mass communication,
pictures still speak the most universally understood language.
Walt Disney Without asking for details, is asking them not to message you an option?
If not, simply find the stories you want, or their profile page to find the stories, and then add them to your bookmarks on your browser.
Then delete/block completely them, and make sure only friends can poke you, and friends can message you if it helps.
You can look at their profiles and their stories whilst not logged in to Lush.
Hope that helps!
Ut incepit fidelis, sic permanet.
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thanks guys that is all very helpful thanks xx