The thing is, add a command like /ingorelist to check the names of people you had ignored using the /ignore command.
There's a 13yo kid in the server, I put him on /ignore some 15-20 days back. After that whenever he came ig, he didn't say a word, I thought he had changed and do not trash talk now, but I was wrong. I remembered that he was on my /ignore list and I did /unignore him some 2 days back XD.
Thats why I think adding /ignorelist can be a good option
OR
Show the names of people you have ignored in player CP.