This is an area we want to improve but as @AviationJunkie mentioned, there would be moderation costs. This is something we can’t ignore since we have a lot of kids playing Infinite Flight and there are strict laws in many countries. If you want to know more about this read this article about a multiplayer game (LEGO Universe) that had to shut because moderation cost were too huge. Granted that we don’t have a trademark this big to protect, we also have a fraction of their budget :smile:
Giving a simple In Game text chat options for advanced player that maintain good standing is an option, but we still need to have an easy way for ppl to report abuse and moderate.
Voice chat would be nice but it very tricky: bandwidth, lag, quality and simply the vast diversity of voice tone and accent that can make communications harder would be a problem. TTS in mobile devices is starting to get really good, I feel we just need to improve our system a bit, have different voices for each pilot on a same frequency, and improve the UX for sending message and we could get something that is far better than what we have today.
I should probably write a FAQ about this since the question seems to be asked often.