The most annoying thing is when you have to sit for hours or even days for a 400-Mg file to finish downloading, only to find out that this file doesn't work. I was chatting with a guy the other day, while downloading a really big file from him, and after an hour or so, he noticed the file I was downloading and he send a message to me saying that file I was downloading doesn't work. He can't even get it to mount!!!!!!!
So he tried it, and he knew that it doesn't work, so why DA HELL is he sharing it?????!!!!!!
Also people who share Demo's, Beta's, or Trial versions should right something indicating that this is not a full version, and you can downloaded it from the publishers site probably a lot faster.