And perhaps because people actually come to discussion boards to, like, discuss stuff... usually involving polysyllabic words longer than three letters.
When making posts, just highlight part of the word, click color=black. The HTML disruption causes your post to not be affected by this virus.
The last time mod-sponsors edited people's posts to say what they wanted them to say about their products, there was a huge uproar. This is no different -- just automated. However, since other boards do it, EF apparently is as well.