Volume over 5 BTC at Poloniex

yes but it is who is constantly trying to rip, I do not understand who and most importantly why it is necessary ...
small log:
0.00000255 50 0.0001275
0.00000267 50 0.0001335
0.00000264 54 0.00014256
0.00000264 2 0.00000528
and more...