Sounds like a good idea Imppa! Now who will be our ambassador?
As for the text, it is reddit so I feel that something short would get the job done. Something like "hi Chris, thanks for taking the time for this AMA. The world of ODST is riddled with mysterious glyphs. One glyph in particular, the Tri glyph (insert picture), has been documented to actually change in appaearence (2 pics of tri glyph altered). It has sparked quite a lot of discussion on the reasoning for it! Are these glyphs simply a reference to the communication method of the Engineers, or is there something more to these glyphs?"