If you do not wish to display your domains under your public profile, you can now make your portfolio private.
In order to make the portfolio private, go to your Settings Page and choose an option under Portfolio Privacy.
Private Leaderboard: This option shows "Private Seller" instead of your real screen name in the Marketplace Leaderboards as well as Featured Sales. Your domain portfolio will still be visible under your Public profile page.
Private Portfolio: This option completely hides your domain portfolio from your public profile page. Keep in mind that this option may negatively impact the SEO rankings of your landing pages.