I've also touched on this same issue with "Pages" you create if you have them listed as (viewable nodes on the forum). They get listed in search also, but the thing is they cannot be searched. No results ever get shown for content on them being searched for (that you know is there to be found). At one point I created 20+ pages and they was all listed in the search engine because they was sub-pages of a top-level page viewable as nodes.
It's madness to have 20 pages listed in the search engine that are not searchable.