Smoke
Ignore-Amus
I agree here with Dan. In this case it doesn't bother me either particularly with tridents where their uneven and muscular trunks is what gives them their character. Incidentally, in a Japanese publication, there was an article about inflicting some small wounds in areas where you wanted the trunk to thicken via making fine, vertical striations on the bark.
I as well as many here have probably heard of this method. I have really never seen any good pictures of a before and after if it is worth scarring up the trunk or not.