if you were to spend time in the spam sections for an hour a day and reported all the garbage posts, you'd hit 5000 reports pretty easily.
Imposible an hour can reported hit 5000. it's not easy, because reporting have wait time each.
example : for senior member have wait time 4 second, full member 8 second, etc...
for other country have slow internet, have much time loading for hit 5k reported/hour.