I play 3rd XI in the Surrey Championship for a London based club which is an OK standard without being brilliant. I've played for around 15 years for the same side and still love it - some of my best mates I met through the club and we still play in the same side and have a strong "social" ethos. The general rule for us on oppo is the closest they are to Croydon the more tw@tty they're likely to be which usually holds true (and also in football/life in general of course). But largely games are hard fought but fairly well mannered. But this year, after a couple of promotions we've encountered the "big clubs" (the ones whose first teams tend to have ex pros most of us have heard of) who regularly turn up with their own "neutral" umpire who then can insist on umpiring both ends based on being "qualified" (once sat in a classroom with some other old blokes for a few hours). The level of cheating is staggering. After one game we were so hacked off we checked the stats - and in the last 1.5 seasons the side had been awarded 3.5 times more LBWs than had been given against them!
I came across a fair few of those "neutral" umpires playing in Sussex. Special mention to the old guy who umpires the Burgess Hill 2nd XI. His finger would be up before the bowler had even considered appealing. There was a game I played where we were something like 23/5 with 4 of the dismissals being very suspect LBW decisions.
Then there's the teams who try to cheat their way to wickets when they see there's an inexperienced umpire. If the ball goes anywhere near the pads or the keeper takes a catch, the whole team goes up screaming their appeal at the umpire.