Disrespect is where I draw the line. And that usually involves immoral proposals and treating me like a piece of meat.
To unfriend or not to unfriend

in my motto ,friend is a person for every good or bad news /events ......forever
and for u ?
I have a much more strict definition of friendship. For me, friend is not just a hang-out buddy or someone I can just play chess with. It involves being there for someone in the time of need. And that takes time to develop such relationship. It's not just "friend request" and "accept".
I know really a lot of people. And most of us call each other friends. But, honestly, I probably have only 2 real friends I can count on.

All my ‘friends’ on Chess.com, to be honest- I just accept the requests to ge them as a follower. Lol
Why do you need a follower?

If you are kidding, why did you accept my request then? Haha lol
Just in case you have an extra Mercedes Benz you want to get rid of. 😂 (I accepted you request before you even mentioned giveaways).

Personally, i will friend whoever that has had a conversation with me, and was nice. I've never unfriended anyone, except some very inactive players. The first thing I would do though, if someone starts arguing with me, or being rude in general, i will unfriend them immediately and block them.

Ok. You can check my profile out, lol but I haven’t updated it recently.
I see it now. That's really nice of you

Again this is not facebook or twitter
You sound like an IT expert. What is your problem?

I feel a friend should be able to tell you if you are wrong and to be a good friend a person should be able to admit when they are wrong.

I feel a friend should be able to tell you if you are wrong and to be a good friend a person should be able to admit when they are wrong.
For "true friends" this is the case. Your original post is an interesting one. Even deeper than what it takes to "unfriend" is what even constitutes as a "real chess.com friend." I add "real" in bold because a "chess.com friend" is simple to define. It is merely accepting the "Add Friend" request sent - nothing more and nothing less.
The psychology behind what chess.com "friends" actually means is probably going to come down to various categories. It sounds harsh to say one friend is in another "category" than another, but I think this is the logical conclusion. Here are some "categories" of friends I can think of:
-chess.com friend that is also a friend of yours in real life. They may or may not even be too active in chess.com, but they are most certainly a category of chess.com friendship.
-chess.com friend who you interact with a lot and consider an online friend of yours. Perhaps you chat every other day, or maybe you have just enjoyed several unrated games with each other. Whatever the reason, this feels like a certain friend "category" to me.
-chess.com friend for a "sparring partner" (this may overlap with the last one). I have several friends on chess.com whom this "category" would fit. We may chat about other topics or interact - but the main interaction is in games and learning. Your "sparring partner" is often times of similar rating to yourself (or ideally a few hundred rating points stronger so you can learn from their play), but many of my "sparring friends" I am several hundred points higher. Remember that they are only unrated games and usually only for learning or fun. By "sparring" I mean that these friends are a great source for many games with you.
-another category of chess.com friend is the one in which you "accept" and they seldom if ever interact with you. Maybe they are busy, or perhaps they just care about friend count/followers. This isn't as strong of a "real friendship" as the ones mentioned above, but it is certainly a "category" to note.
I write a lot but here is a related forum topic I began a long time ago - it may be of interest here:
https://www.chess.com/forum/view/off-topic/chess-com-friends
I used to be fairly selective with my chess.com friends, but since have become way more flexible and accepted many of them.
To answer the op, the rare case that I un-friend or block someone would have to be something greatly conflicting. Perhaps a controversial comment you disagree on or maybe an argument etc. I don't know: I don't think I've had this happen with any of my chess.com friends yet, but I'd imagine it would take a lot to "un-friend" someone since the chess.com "friendship" alone means so little! It is the interactions that makes friendships worth something - not clicking a button to "Add Friend."
How strong of mind are you?
What does a chess.com acquaintance have to do to you before you unfriend them?
What limits do you set for your friends and your friendship?
I believe I have a high tolerance and can take whatever you can deliver.
Am I too friendly?