i booed the team at the 60th minute when we were losing to Bornmuff under Hughton. I was leaving at that point and genuinely feel I was right to do so.
Once, when about 9 years old (early 70's), and standing in a long slow moving queue on holiday in Wales a group of school children were taken to the front of the queue . My mother started booing them and the whole queue joined in including me. Maybe it was an English Welsh thing but it still makes me chuckle.
Boo-ed the landlord when he kept switching the P.A. off at the much missed Cable's penultimate gig. Luckily the band kept switching it back on again. Bit of a pantomime end to a fantastic gig.
Maybe the odd opposing team when coming out at the start or opposing teams or players during a match. I really can't remember. It would have been a long time ago.
I booed the secret Santa name I was given yesterday, so much so that my boss allowed me to pick again and I got the person I really wanted. Booing is a good thing if used responsibly and appropriately.
I also boo refs because that's always going to be ok.