Are you seeing member related buttons showing up on your customer's receipts in the member portal?
You can automatically hide these on their receipt by going to the product within the Control Panel and setting the product status to Not Available for Purchase or Archived. This data can still flow through the POS but it won't allow your members to see it on the receipt.
Now when your members see your order, it will display only active items. If an item is not set to active, but there was a charge on the order, the member will still see this on their receipt, however it will say "Applied to Order" vs. the product name.