At my local hydro store is on a saturday the traffic police sit round the corner and a fred that they tailed him till he left the area and he thought phew that was close as he had purchesed stuff that he couldnt cover anyway they pulled of him but when he got home 3 hours later his door came in and on the warrent was suspision of cannabis cultivatoin . so he beleaves that the police that tailed him checked the registratoin of his car got his address and passed it onto his locaL CID and they got a warrent and bust him now the said hydro store has set up a system that if the police are sitting in the area surrounding the shop they deliver for free and the hydro dude assured me that there is no way his delivery driver is followed as they use anti survalance technics. so just a heads up be safe the postman.
ps most tomato producers in the uk grow hydro its more cost efficient the size of those greenhouses its not cost effective to grow in soil so if you have a look they are full with massive hydro units / well all the flower and tomato producers in my area do