The resounding lesson from this and many similar posts is this: If you are playing with randoms, always host. No, this does not mean join a fireteam and demand host. This means start your own group and host. There are too many trolls and frankly crappy 34s out there. This expansion, and how easy it is to hit 34 has ruined a majority of LFG sites. I feel bad for your brother because he got screwed by some grade A doucherockets, but like many have said, this is a great lesson. Not all lessons need to be sugar coated. Just sit him down and explain some people are just like that. My sympathies-