I haven't had to deal with this situation as of yet , but I don't think that I would approach an armed trespasser . If I detect somebody poaching on my property my first response will be to contact the local CO and have him deal with it . Unarmed trespassers will be politely ******ed out and warned not to return , those who do return will face arrest and prosecution . My land can't be approached at high speed by ATVs due to it's thick wooded condition, so I could put out tire spikes without risk of a lawsuit if the need arises, and it would only arise if some hard headed dipsheit makes it necessary . Once the wheeler is disabled it will be impounded by law enforcement at it's owner's expense .