Trolls will be trolls.  Some have 20+ posts

Right. Let them know how much they bother you so they stop trying to bother you. That'll work.

Feed em and they grow larger and larger.

Actually , i am enjoin trolls, only i am have against them - they mainly interfere in fields where they are complite zeros.

a person who enters a blog comments conversation with the intent to hijack it or divert it from it's subject and tone but does so in such a clumsy, clueless manner as to provoke laughter and derision rather than humorless animosity