This is an enhancement request to add the capability to hide file junctions from a lister. The capability could be added in two places. In "Settings->Preferences->File Display" there is a section called "Global hide filters". A new checkbox could be added to "Hide junction files". In "Edit->Select by Pattern->Advanced", a checkbox labeled "L" (for link) could be added to the Attributes section for the reparse point attribute. Checking H+S+L would allow selection of file junctions.
Why do you want to hide them on their own (without hiding all system+hidden folders)?