Poor sportsmanship has been around, and will be around, forever. There's no getting around it and there's no changing it. The only thing worth addressing is that by posting and complaining about it, you've shown that they got in your head and won. You just have to brush it off as best as you can and move on. I don't play trials anymore so I don't deal with overly-agressive teabaggers, but I do get in friendly bag-offs with opponents every few games, always initiated by them for whatever reason, that generally end with waves at the end and laughs over how out-of-the-way some people go to get that last bag in before the time is up. Just roll up your sleeves, and move on to the next match. :)