People who just put an address in their post instead of hyperlinking it (not on this forum as I think it automatically hyperlinks here). Stop being lazy! I'm already too lazy to copy the adress and paste it into a new window! Only one of us can be lazy, and it's me.
And of course all the other spelling/capitalization/leetspeak morons out there. A little misspelling is fine, we all do it while typing, but if you spell so badly it makes it tough for me to comprehend then we have a problem.