Meanwhile I've only ever considered the banners to be annoying and beg-y, but not any sort of claim that they are running out of money. Do the people "scammed" by "help us reach our fundraising goal" also get scammed by those emails about "donald trump's defense fund" and similar? Why didn't they just look up whether wikipedia is running out of money?

I don't understand how a disruptive banner that makes no claims can be considered nefarious.