Moving through it momentarily would apparently do them little harm. It was, as things stood, no threat to the two of them. It was merely the question of whether Rhodes felt in a good enough mood to take care of it--- or if he thought it would be a sufficient threat to others. Sivain's own opinions on the matter were of less consequence, for he didn't have the means to deal with the problem. Besides that, he was neutral on the matter anyway, and wouldn't have argued either way.
Rhodes paused in his grooming to deliberate over this. “It... would be best if we looked into it,” he said slowly. “I don't like the feel of it. It's true that it doesn't pose much danger, but the implications...”