If they drive:
lol all sorts o f things.. duplicate the c**ts plates and speed through cameras.
inject super glue mixed with bicarbonate of soda in his locks.
take out 2 of his tyres
cut his fuel lines
snip his hanbrake cable and move his car.
nitromose his bonet
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if they dont drive:
pour concrete down a manhole near his house.....
order a skip, limo, 24hour Glazing, pest control, builders , plumbers, pizzas,curries to there house....
snip his phone line, tv aerial, sat cables up root his plants, pour weed killer on his lawn, torch his fence, sh*t mail there house with free offers etc...
wire up a diode so itll short,wrap it round a match(waterproofing add candle wax) put a length of wire on and add it to where electric will run. mix 3 : 1 :1 :1 weedkiller, sugar, chopped up tyre rubber and oil. will cause and excellent incendry device...grind and compress in to steel pipe for a fragmentation affect.
when power runs through it shorts the diode, lights the match, catches the mix and hey presto.
harsh but fair lol.