I fear there is a bit of misinformation being supplied to you here 270wsm. Yes, FC do use large cage traps and this has, I believe, proven far more successful than shooting. They only carry out control of any sort Sept to Dec to try and avoid culling animals with dependant young and I also believe that they modified the design of the cage trap a couple of years ago to try and prevent injury to any piglets trapped with a sow. It is quite possible to still capture sows with dependant young during their "open" season and I hope if they do so that all animals are released but i cannot confirm this and still fear injury to piglets and issues with estranged young. Suitable animals trapped are shot (pistol) and no doubt end up in the food chain just like the large volumes of deer the FC cull each year. FC have been, by far, the largest user of the AHVLA trichinella testing service in recent years so one must assume that all animals culled are tested.
The Forest of Dean has full open public access and is heavily used as such. FC will be very concerned about health and safety as well as PR and I really cannot see a day any time soon when private stalkers will get access as FC have 4 full time rangers who culled 150+ in 2011 and 100+ last year. I am no apologist for FC and have some concerns of my own over this but profit will not be the motive in this instance as I am sure it actually costs them money to do it!
100 * £100 average carcass value = £10,000 and 4 rangers, kit and vehicles will be a lot more than this!
Lets hope they don't hit em too hard.