With all due respect, information is only ever added to the wiki by volunteered contribution. I understand that it's frustrating, but it doesn't do much good to expect other people to do all the work simply because you tell them to.
If you yourself are unable to collect all the screenshots yourself, I would recommend at least making note of every episode and instance you know of and either describe them in a forum post or perhaps even add that information to the series' page. That way the information will at least be available for those curious enough to check it out for themselves.