what is the best way to get back at your plumber?

So, I am thinking about leaving work in the middle of the morning, going to the "flat under construction" and telling the plumber what a loser I think he is. It wouldn't help with fitting the bathtub properly but it would certainly calm me down and make me feel a lot better.

For the last few months construction workers have been driving me crazy - this morning the plumber said that our villeroy bathtub was useless and he has decided to fit it the way he thinks it's right, ignoring the instructions.

I didn't want to be whining in my very first post but anyway :-) At least my bad mood urged me to start the blog. I had been planning this for ages but never got round to doing it.