Hi there,

Unfortunately, there is no option to disallow/prevent user using emoji/icons in their full name.

You may submit a feature request for this issue at https://stackideas.com/voices/easysocial or if you require us to perform the customization for you, you can always request for a quote from us at https://crm.stackideas.com and select "Customizations" . Our sales person would gladly send you a quote for the customization that you have requested.

Thanks.