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1. You can hide the content blocks page by setting permissions to the content blocks backend page. Go to Administration -> Backend Pages ->Content blocks and from the permissions for this page explicitly deny the User you would like to restrict.
2. As for your other requirement, to restrict user from editing and publishing forms, but allowing him to see forms responses, go to Administration -> Settings -> Pages -> Sitemapfilters -> Forms and uncheck the filter, which is checked by default. This way the user will be able to see the Forms page, as well as the form response, but won't have the required permissions to edit or publish a form.
Let me know if you need additional assistance.
the Telerik team
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