There was 1 bug I know of in messaging systems regarding emoji domains.
This email address sent by SMS / PM or DM viewed on an Android device or desktop, on various platforms
eg. Update@™️Acme.com
would pull up the home page of www.Acme.com on your Android device, desktop and some Apple devices potentially tricking someone into opening up an email and being compromised.
And at that time maybe it's nothing but somebody was selling www.tmvisa.com for 70k USD on Godaddy and today tmwordpress.com still redirects to a foreign porn site.
More than 90% of non .gov websites were affected which included anti virus companies, however today it is not a problem.