scared driver delight,
But to suggest a safe speed along a street has no point?
I think the yellow signs are primarily intended for short distance situations where the ability to enforce is limited and the speed reduction is temporary. It’s different from a straight thoroughfare.
So, if I understand your argument correctly, a “suggested” speed of 25/35mph is appropriate for Coney Island Ave, but ticketing/fining people is inappropriate unless they are really flying? If you feel that there is a reasonable speed that is in excess of the limit, then why would you consider the limit to be a “great suggestion”?