Longer the beard is, harder is to keep it tidy and neat. With 6 inches goatee it will be impossible to keep all those wild hairs in control. But, listen to VOT, and if it really gets out of control, then maybe trim few of those hairs sticking out with pair of scissors.

New members, check out Frequently Asked Questions and Rules of Beard Acquisition.
To upload and post pictures, check step-by-step instructions.