I saw invalid clicks on two of my forums today, and extremely shocked to see the following report.

Page impressions Clicks Page CTR Page eCPM [?] Estimated earnings

20 73 365.00% $19.38 $0.39
17 12 70.59% $0.00 $0.00

please give your ideas, how to stop such invalid clicks and how to prevent my account from getting disabled due to such invalid, unwanted, useless clicks?