Fanatical devotion. Unswerving loyalty. Inexplicable hate toward all those who disagree with their beliefs. An inability to alter their views or progress beyond an opinion they have clung to for years.
You don't want to upset a tech fanboy.
Take Apple's new app release, for example: 'Move to iOS' is the tech giant's first ever app Android, which is a pretty big deal. It's like Kanye West deciding to put out an album of Frank Sinatra covers (actually, that could be pretty good... Kanye?).
The app is designed to help those Android users who've bought a new iPhone to move their data from their old handset to their new one, copying data, photos and contacts without any hassle.
You'd think the Android community would smirk at it - raise a quizzical eyebrow and scoff at those 'traitors' who'd have cause to use it. But no, they're not that mature. So instead they've unleashed a tidal wave of hate at it, amassing some 1,750 negative reviews in a matter of hours. Here are some of the best...