What would you do?

ICBM

Leave an open paint can full of diesel just your side of the fence. It won't catch fire - the flash point is too high - but the smell will probably make them think it will.

Emp_Fab

Just go around there, speak to the manager, explain the situation nicely but make sure that he/she knows that if they fail to take action within x days, you will start to take your own measures to protect your right to a smoke-free property.  Don't say what they are, but hopefully, they will see sense and want to avoid any potentially embarrassing situations.  If this doesn't work, just pour petrol all around the smoking area, just before they all turn up, so the fumes are thick, then casually flick a lit Zippo over your shoulder and say "Yippee-Ki-Yay, Motherfuckers".

BRISTOL86

How about a 'DANGER: LIVE FIRING RANGE' sign?!

WezV

Don't get into any tit for tat stuff... those employees have a lot less to lose than you do. 
 

The only real solution is to move.  Not saying you should or could, but it's worth considering if the option is available to you.  

Any other solution relies on some human decency on the other side of the hedge... but you are dealing with a group, not the individuals.  

ESBlonde

Bottle your piss.  Take it out early and poor it on your ground near the offenders. When they turn up for work it will smell like a toilet. Do it daily for a week and they will move. The smell goes away in a few days and after a good rain.

57Deluxe

you own a guitar and amp, right???

TheBlueWolf

Is there some sort  of complaint you can make via the council or someone else? I've got no idea how far the law goes in this case, or even if it's worth complaining about but it *might* make them take more notice.

fretmeister

Sporky said:

If they're mostly young, and you're mostly not, how about one of those utlrasonic doohickies for getting rid of teenagers from shops?

Or a dog.

https://www.compoundsecurity.co.uk/security-equipment/mosquito-mk4-anti-loitering-device

There are are far cheaper ones now, but that will give you an idea.

musteatbrain

Regular disposable barbecues. Smoke them out.

Placidcasual79

Start small - get round there after they've finished work - leave a small collection of pebbles in an archaic pattern, gradually progress to larger stones and begin to include sticks crudely fashioned in symbolic shapes, Blair Witch style..... then over the next week, include roughly painted unfathomable characters  and begin to play, initially at low volume, a tape of low moaning, interspersed with bursts of white noise and chattering voices.  Finally find a few bits of road kill and skewer them at various points around the area in which they smoke, don't neglect your painted symbols, stone patterns and stick work, then set up strobe lights focusing on the road kill. When most of the crowd have gathered to discuss the strange goings (and hopefully its dark), smash the music from the Omen on at ear shattering volume then trigger the strobes that are focused on the road kill in jarring sequence......... 

wave100

Winny_Pooh said:

Definitely Nickleback on outdoor speakers connected to a motion sensor

Cruel and Unusual Punishment!

ThePrettyDamned

wave100 said:

Winny_Pooh said:

Definitely Nickleback on outdoor speakers connected to a motion sensor

Cruel and Unusual Punishment!

Yeah no one deserves that, not even smokers.

MatthewShreddery

LMAO guys!

Evilmags

If you want to stink them out it´s a bit gross, but it works. Get a petrol powered leaf blower, put a dogshit or one of your own inside the exhaust tube thing of the blower and fix a mesh onto it. It will basically give you a stink gun. (if every time my lawnmower hits a dogshit, bags it and blows the smell at the user is anything to go by)

marcus449

Ask the manager politely if you can put a sign up stating something along the lines of 'For the consideration of the local neighbours please remember to smoke round the back (with and arrow)' Perhaps laminated and tied to the other side of the hedge so its the first thing they see when they walk out? 

As much as it's comical to play pranks to get them to move i reckon co-operation is key here. It's much easier for them to stand still and annoy you by smoking that it is for you to think of creative ways for them to move on. 

Failing that I know a couple of guys with fake names who will move anyone on for a fee.