I've noticed quite a few pages for radio stations, particularly in the U.S., with a long list of headings for years and "missing logo" tags. Here's just one example: KRMD
The problem I see with these pages is that most- but not all- radio stations in the U.S., in particular the smaller ones, simply did not have or use what we would call a logo until the 1950s or even later in many cases. In the KRMD example, the first heading is for 1926, so there is a long list of empty headings that I can guarantee will never be filled with logos. You might end up with a few newspaper ads or schedules but even most of these won't qualify as a logo.
These pages are a quite unsightly in this state, in my opinion. On some of these pages, you have to scroll way down to see the first logo instance. Is there a rationale for this? Would it be appropriate to delete empty headings when it is known with certainty that no logos exist?