Yer our local site used to do this every year at our fair... Back when there wasnt so much trouble they just trusted people and had 3 staff incase anyone tried to turn around.... however now a days what they do you use one of the metal clips and attach some wire to the bottom of the barrel and to either a peg in the floor or the target range at the back so the punter would have to lean right over the counter to turn the marker round...
The thing you have to think about is is it worth it if you are giving away free site entry. i mean if you were a site then this is a great way to make loads of money but for you yourself... First of all to be there you will have to purchase a spot which is usually £100-200 depending on the size of your fair... then you got insurance on top of that, the paint, Co2 etc etc...
the Idea is good and been done many a time before, but really i would leave it up to the site, as you sound like you more thinking of the get rich quick scheme
The thing you have to think about is is it worth it if you are giving away free site entry. i mean if you were a site then this is a great way to make loads of money but for you yourself... First of all to be there you will have to purchase a spot which is usually £100-200 depending on the size of your fair... then you got insurance on top of that, the paint, Co2 etc etc...
the Idea is good and been done many a time before, but really i would leave it up to the site, as you sound like you more thinking of the get rich quick scheme