Copy && Paste
Copying and pasting code is meh, sometimes it works great, other times you probably should just learn what it's doing and implement it your way for your code.
Copying and pasting t-shirt designs and trademarked brand names are not ok. There has been some confusion lately on my company vs a knockoff competitor. I started DVLPR® in 2014, three years before the other brand showed up. DVLPR® is a registered trademark owned by my company DVLPR, LLC and can only be used by my company.