It's not for me, I'll admit that.
However, this guy has done something to/for his car.
He's also decided to share this knowledge/insight etc. with everyone on the forum.
The majority of people have given him **** about it - which is a shame as this kind of attitude may tend to deter people from posting on the forum.
We've all done things which we thought were cool/intelligent etc. but somebody else has not had that opinion. We've all posted stupid comments on here too.