Here in Mid Wales, the sheep seem to like licking it!
There are often wounds in the conifers at low levels and the resin that seeps out is licked by the sheep in the adjacent fields so that its all smooth. You can prise a piece of resin off lower down for fire lighting and glue, but if you want it for chewing yourself, I'd go for something a bit higher up the tree!
Theres no need to create further damage as there'll be plenty occouring naturally.
ATB
Ogri the trog