Mayor Bill de Blasio’s critics let him know how they really felt about him ordering New Yorkers to snitch on each other for violating social-distancing rules — by flooding his new tip line with crank complaints including “dick pics” and people flipping the bird, The Post has learned.

Photos of extended middle fingers, the mayor dropping the Staten Island groundhog and news coverage of him going to the gym have all been texted to a special tip line that de Blasio announced Saturday, according to screenshots posted on Twitter.