People tend to clean their walls so I doubt this will be happening.
*has 128 pages of wall posts and can't be bothered cleaning oh God*
I also came up with a suggestion to 'pin' wall posts which I can't be bothered linking to, so that would fix this problem. It got many upvotes meaning the suggestion is popular, Pokemaster hasn't stated his opinion though.
And you can always type site:pokemondb.net/pokebase/user/(username)/wall into Google with your search query following.