Back in 2007, mobile phones used a system called T9 from Nuance corp which was trained on a word corpus taken from IRC and similar chats.
This caused all kinds of issues - the mobile phones would accept offensive words like "naziparking" but reject normal language like "world peace".
Using reddit may lead to ... surprises.
Source: http://spraktidningen.se/artiklar/2007/11/darfor-ar-din-mobi...
Translated by Google: https://translate.google.se/translate?sl=sv&tl=en&js=y&prev=...