Sometimes it’s ok but it can be bloody rude. I recently added a work colleague on Facebook (didn’t work closely but always friendly & she accepted my request straight away). She started a new job recently & had her leaving do last night. I messaged this morning to ask if they had a good evening & that I hoped her new job was going ok & she just sent a thumbs up. Later, I messaged that one of the guys had said there would be a few sore heads & she did another thumbs up ( fair enough that time). I just think the first time was a bit rude & that she could at least have said thank you. Am I overthinking it a bit?