The Worst Strategy You've Overheard at a Table

[Arbitrage]

I couldn't beleive some of the strategy I heard at my 6-12 game today. Flop is checked around. I turn the nut straight in the BB w/ 5-7 in a 5 way pot and lead out, get called by button. The 6 pairs on the river. I bet, button raises and I three bet and MHIG. A couple of players try and lecture me on how I shouln't have 3-bet after the board had paired and that I play bad. They call down with under pairs & gutshots and they won't 3-bet without the nuts?

I know people have probably heard alot worse. These players logic just boggles my mind.