"How would you feel if you sent a friend a message and they did not bother to respond?"

"An eye for an eye makes the whole world blind." - Mahatma Gandhi
I've got my blind spots too--I'm certain there are people I try replying to and don't quite connect because I'm working through my own issues.


Also, it depends on how important the message/context for the message seemed. If they made it seem important, then communications went silent even after you tried to follow up, and you find out they blew it off, then yeah I think a reckoning and then some's in order.
Here's how I think I'd try approaching it:

If they've made the effort to reach out, to reply again, or at least try to be responsive to your concerns, great. Forgiveness isn't the same as forgetting: "You are not condoning or accepting [their] behavior if you forgive [them]. Instead you are making a choice not to allow hurts from the past to steal your joy in the present and in the future."

1. When you choose to respond the same way without explanation, it can be abusive and perpetuate the same behaviors that irk you
2. Don't assume anything beyond what's in your own reality
3. If it really matters, call them out on it for the facts only and create an opportunity to amend the issue

I appreciate that you reserve judgment. I'd hope a friend does with me as well and takes the courage to speak up when needed as it helps everyone become better people too.

If they repeatedly don't choose to engage and resolve, it toes the line for being abusive. You did what you need to for your sake, theirs, and maybe anyone else who might encounter them. Allocate your priorities accordingly.

Be the best person you can be, if you did your part then it's on their conscience to reply. I think spiting a person without warning is petty and emotionally immature if better ways to clearly address the problem exist.

I'll also disclose that it's tough even for me to read my own guidelines and hold onto them. I've recently been in a similar situation with a lot of people who didn't reply to me. That said, it's what I wholly believe so I'm sticking with it.