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.
+1
I thought about this immediately after reading OP. The essence of spreading phishing links is to have victims click on it as many times as possible or as fast as possible.
Phishing links I know are not invisible traps set and waiting to catch even if one person in one year. Phishing sites come with some baits to enable it catch many victims within a short possible time.
Hiding a Phishing link with the forum background color will yield no much results because I don't see myself clicking every word or blank spaces.
This will work unless there is a kind of SEO optimisation the spreader wants through the link. Does it really work that way?
If yes, that means one can be wearing signature of a company and still be promoting his personal signature through hiding links.