I received a minor from a single report when I first started botting (my own actually - I was babysitting like always and I paused a script to report some kid who showed up and started automining in the same place I was because it pissed me off because it essentially halved my gp and exp per hour which make it a waste of time for both of us. I had never botted when I was AFK before then, so I know no one reported me. Anyway, I reported him and received a minor within the hour). So I would assume a single report from another player would be just as effective.