I was not in the crowd so I can't say anything more about that. That said,

> This dude, as a contractor-for-hire, injected unwanted code he calls "just an easter egg" in the final firmware of the badge. This "unwanted code" is a screen asking for bitcoin donations and self-aggrandizing himself.

If this is how you feel about an easter egg I suspect you misunderstand the point of DEF CON. Maybe the organizers of the conference do too.