'It is raining here also'

Funny I was just thinking of the wording of a sign to put up to disuade folks from dumping their pick-nick rubbish at a local beauty spot.

It was on the lines of:

If you do decide to do this, rather than use the bins provided, there is unlikely to be an immediate penalty imposed upon you, as there is no one policing this area. However, if you should decide at this point to do what you know to be wrong - please remember this moment the next time a bad thing happens to you and you ask your self - why me?