if you choose the peace route on mumbai servers, and probably shut up when the other party is being toxic, things seem to go smoothly. They have a special hatred for instalockers( previously it was just instalock duelists, now it's instalock duelists + initiators+ chamber). I have almost always tried to be peaceful, and things seem to work. Some people are perpetually braindead and/or don't have speakers who will do the most stupid plays even after you advise them not to.
overall it's a normal experience unless you kick the hornet's nest, if you do...they will insult your whole fucking ancestry just to spite you...but genrally the bm is just verbal, I haven't seen that many in game griefers, but that may just be my own experience.