Accepting an invitation to a social event (e.g a birthday party or dinner party), then cancelling because you’ve had a “better offer”. I feel particularly sorry for children who have no shows at their birthday parties, sometimes because their guests’ PARENTS offered to take them out somewhere else. What a shitty habit to pass on to your children.^ This x100. Just do not, please do not accept the invite so the parents could plan something else.
Massively shitty habit to raise your kids with. Not had this with parties but a friend (Ish) does this. When I was going through my divorce (which largely she was incredibly supportive of) I made plans with her to spend a child free evening together. She cancelled saying she was too tired - I was fine with that we had babies. Then later in the week I heard someone ask her what she did on sat - she replied 'oh yeh I ended up staying out until 1am with the school mums it was great!' I was crushed. I took a huge step back from that friendship then.
Not rsvp-ing formal invitations.
People getting up constantly from the table during meals. Makes me crazy.