Using this to spread phishing or malware links isn't really the best way to do it. Think about it. If you wanted to share something malicious, your goal is to have as many people click on that link as possible. You can't click on something you don't even know is there and if you don't even see it unless you come across it by mistake like when quoting a post the way you did.
But the possibility to take advantage of it is definitely there and if theymos can quickly fix that, I hope he does.
Also, would it be possible to have a notification before opening links, sort of "are you sure you want to b redirected to..."
This would prevent inadvertently clicking on links, especially when you're on mobile.
+1
Only for external links though. There is no need for that if the link redirects you to a different forum post.