It was the hardest thing ever.
In first incident I chose to ignore a certain user being targeted by others for posting repeated messages. The person left a very angry message and left.
Comes the second incident, I thought I learnt my lesson. Once a user is targeted, I tried to stop others from targeting the person. But this time the people who targeted the person wrote angry messages and left.
Someone asked a dumb question, I replied in good faith. The conversation goes on and on and becomes weirder and weirder, until the person said "You shouldn't have replied me.", and left.
Honestly I am just counting on luck at this time that I can keep it running.