I think that when it gets to the case of a serious issue, where discipline needs to be public, then it should go through the usual process for disciplining a member. So usually it would be referred to the committee and then back to the House for a final sanction, if needed. Most harassment issues, I would imagine, would be dealt with at the mediation stage. They would be dealt with in the phase of confidential dealing with the complainant and the respondent trying to sort out the issues and have a satisfactory conclusion worked out.
In some cases that's not going to be possible. You may have a repeat offender. The situation may have been so serious it may verge on criminal behaviour. The person involved may have raised a question of whether they're fit to remain a member of the House, and I think only the House can deal with that through the normal process where they would consider suspending or expelling a member.