Add words to a local copy of WordNet

I am using WordNet, accessed through Python's NLTK to compare the synsets of words from social media. Many of those words aren't in the version of WordNet that NLTK connects to.

When I say I words I mean domain-specific terms, not abbreviations or emoticons.

I've compiled a list of these words and would like to merge that list with WordNet.

Searching for prior efforts turns up on attempts to develop methods of automatically updating WordNet.

The steps I imagine are:

1. Clone the WordNet db
2. Write an extension of the WordNet module that looks for a local copy
3. Update that local copy.

How reasonable does this sound?