who? 1d?
no lol Super Junior
it was nothing major but i remember when Sungmin got married in 2014, some members were obviously not happy about it and they left his wedding party halfway through and went out to eat sushi instead and kept sharing selfies in twitter as if making sure to let everyone know their stance (i assume it was to appease their derranged fans that denounced Sungmin). It was disgraceful and disappointing, i ended up unfollowing all of SJ members' twitter and ig accounts except for Yesung (because he was in the Army at the time and also because he never gave that kinda vibe, he only cares about fashion and photography lol) and Eunhyuk and Siwon (because at the time they were the only members that were openly friendly toward Sungmin and supportive of him but then i ended up unfollowing Siwon too for other reasons but i digress).
it was a turning point for me as a fan, now i practically only listen to the music and don't care about the members anymore (aside from Yesung, Eunhyuk and Kyuhyun)
on a lighter note, i remember sometimes circa 2012 or 2013, SJ's 86line (Siwon, Eunhyuk and Donghae) suddenly started making fun of Yesung's obsession with selfies and he was so confused, he was all like "what did i do wrong exactly?" and then "Yesung vs 86line" trended wordlwide in twitter for days because the members kept bickering back and forth in twitter and some kpop news sites deadass thought they were fighting for real and wrote articles about SJ members beefing publicly and think pieces about a probable disbandment 
