I have had some threatening calls after leaflet drops, but not bothered, it makes me laugh, im not a big guy, but i aint scared of anyone so i just laugh and besides i got a big irish family, so wed all go after em haha
Best way like ronnie says is just keep on with your business, and you will grow and they will shrink with there bad business acumen, anyone who tries to build by threatening people is never going anywhere , they are too small minded too, take all his custies