It is best to separate the ladder from non-ladder. It's inconvenient to have to use the filter every time you visit the forum. When you search, you'll get both non-ladder and ladder results, which means you'll have to read twice as many postings. People are making purchases they did not intend to make because they are intertwined.

if it helps, you can select the nl/l tag before searching, and it'll take that into account