People cheat all the time and there is no point taking the high ground as you only end up losing. I got some fearful stick in a league game last season for a slight glove that the umpire didn't hear. This team of saints had already turned down 3 plumb lbws when we bowled to further their cause, why should they continue to benefit from cheating? I batted on and we won, as we would of done much earlier if they had given our lbws.
That sort of thing really annoys the hell out of me - we played a side a couple of years back who gave literally nothing - including their skipper getting away with being caught at slip, three fine edges to the keeper, a catch off the glove at short leg, several LBWs and one call of dead ball when their star batsman was about to be run out by the length of the pitch. Then when we batted, they questioned every single decision, even though the vast majority were appeals from their left armer who wanted to bowl big offies over the wicket and get LBWs.
Seamer bowls a big inducker that goes off a thin edge onto my pad and rebounds back to him. He appeals for the LBW, umpire turns him down...
...end of the over one of his team mates points out that I may have hit it without cottoning that the ball had gone straight back...and the lad starts giving me all kinds of abuse!