Stop in for a cup of coffee
I'm sure excess alcohol, or drugs may bring out the worst in a few. There's a couple here it may just a part of the posting style - and maybe that's how they deal with people in real life too.
I think its hard for many to respond to queries totally dispassionately. When a person has invested x amount of dollars and/or time, they want to believe its something really good. For themselves sure, because that's a personal decision. But by promoting for others there's a degree self confirmation. Others have phrased this better but I think you get where the emotional involvement comes from.
And there's always some folks who just are in a rut needing drama in their lives. Sad but very common.