A warning....

At the pertol station there is a funny warning.

All of u know smoker still smoke at the pertol station, which is very dangerous as it may cause
Explosion

So the station people put up different poster like
"pls do not smoke as it may cause Explosion"
"if u smoke here u will be fined $$$"
"pls do not smoke as it may kill both you and me"
to tell smoker not to smoke in the station as it is dangerous but it was useless, everything fail.

So one smart guy( i don't know who) put up some warning poster around the station to warn the smoker not to smoke.he wrote :

"If u want to cause a explsion pls smoke here,
but pls leave yr address down before u smoke
so we can sent yr ASHES back to yr family."

Soon less and less people smoke at the pertol station.
.................
This joke is taken from a book.