You'd be quite surprised. If I've learned anything it's you can't trust anyone on the internet.
PokeMMO is already full of scammers who drop 0's off of their offers in the trade chat.
"Doing all of that" is as easy as tying your shoes to many.
This.
If anyone ever got access to your PC either physically or with malicious software they could easily steal your account.
Hell, even someone with TeamViewer trying to help you with a computer issue would have access to your password.