Sorry @pinkfonies it wasn't meant to be at all "passive". Actually it wasn't Actually meant to be aggressive either. I was, and am, annoyed and frustrated by @crossroads1 OP, I wouldn't expect anyone over the age of 8 to get upset by such a small unimportant thing. But then it was never a thing to send other people an Anniversary Card in my or my DH's family.
My response to the OP was merely an honest one on my part. I really think that the reason the OP's in-laws might have singled out her and her DH from getting an anniversary card, could very well be because they are very much aware of how much "cross" hates them. I think it is very much in the OP's interest to try and think about how her behaviour can cause corresponding behaviours in others. I think that that would be a very valuble lesson to learn. For goodness sake, she asked almost gleefully, and definitely hopefully, if their lack of good wishes meant that she could use it as an excuse to not spend time with them.
She really does need to start growing up now, and she threw herself in the depend when deciding to start on Mumsnet! I also hate all this hatred and harshness on MN 'pink', including yours towards me, but I will shrug it off because I am an adult, and because anyone who makes a comment, or even starts a thread, is opening themselves up to other peoples thoughts etc - even when it is not in the AIBU section. If 'cross' has been upset by thinking strangers on MN are being horrible to her, then maybe it will make her think about whether she is being horrible to anyone herself?
My biggest hope on this thread, is that the OP will learn to be nicer to other people if she wants it reciprocated, and to not "sweat the small stuff", because like most of the rest of us have experienced at one time or another, she will probably have much more serious things in her life to deal with than this... I do, of course, wish her well for the future, as I am sure most other Mumsnetters do as well.