The scary thing is that it doesn't seem that outrageous:
WATERLOO, Ind. - A northeast Indiana gas station wanted to scare customers away after it ran out of gas, so it posted a price of $5.99 a gallon for unleaded regular.
[. . .]
Employee Piper Withley says they put the high price up as a deterrent, hoping to avoid having people waste their time stopping at the station, only to find that they were out of gas.
This is just a small suggestion, but, next time, a simple "Out of gas" sign might be better.