All of below also result in a bonus of a angry or annoyed MM to the person, or a MM just statting plainly, "I am blocking you."
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If you try to friend me, and you are below 15, I will reject and block you.

If you talk without any proper grammer, I will block you.

If I just don't like you, I will block you.

If you mail me and ask me to vote for you in a contest, I will block you.

If you are not a friend and ask me to chat, I will block you.
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If you friend request me, and I just don't like you, the request will rot, and I will block you.

If you are a newb, and friend request me, the request will probably rot, and I'll block you.

If you friend request me, and I reject it just 'cause, and you mail me asking, "Why did you reject my friend request?"
You are so getting blocked.
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Pets not for trade unless I feel so otherwise.
Gallery not for sell.
Anything in shop IS for sell.