I never thought about Shaline getting body dysmorphia, but reckon you're right. When I watched Fridays, I reckoned he was upset at Bex and Louise laughing (thinking they were laughing about him) and he will do some sort of revenge by publishing photos of Bec (but she didn't send any in the end, did she?) or starting rumours about her at school.
He really isn't a very good actor though, unless gormless is what he's trying to portray, so totally agree with pp that I'm not sure he could carry off a body dysmorphia storyline.
I did wonder if all the bins not being collected was setting up for a big fire story, entrances/ exits blocked with bins and people unable to escape, the waste fuelling the flames etc etc.....but apparently the recycling was taken away so there goes my theory!