My arguments with people are never stupid.............trees, lamp-posts, lawn-mowers or motorbikes that won't start, British Friesians, Herdwick hogs, and, worst of all, goats that don't want to get milked - now that can get stupid.
I fell out with my best friend in about 1995 over a Brian McClair panini sticker. I had almost completed my sticker album, and when I went on holiday I left him in charge of trying to get the final few. When I got back he was very excited and told me he'd managed to get all of my missing stickers, which, to his credit, he had. However, the contents of my swap pile seemingly hadn't been enough to get some Tottenham Hotspur defensive no-mark (possibly Justin Edinburgh) off of a kid in the year above and my friend had agreed to CUT OUT Brian McClair from my album. My 8-year-old brain couldn't comprehend such an act (and tbh my now 28-year-old brain can't either). Who does that??
Myself and my next door neighbour used to be massively into Sonic during our later Primary school years. We used to get the Sonic comic/magazine and pretty much read it together. Anyway, our genius 8-9 year old brains decided that we were going to make our own Sonic magazine, create the storylines and sell it to make our fortune. So we got the A4 paper and the colouring pencils out and started doing it, we spent a good few early evenings doing this and pretty much made a 4-5 page comic. One night that week, we fell out about something stupid so the bastard got our Sonic comic and tore it up in front of me. I was devastated and had a right strop. Stomped off and said that he'd "ruined my life". Got my own back though didn't I when I slept with his bird years later..........*