To those who forced me to do this, I have to say that I'm rather disappointed in all of you. In a nutshell, what you have done is request that I behave more like the PAP than a liberal, tolerant government you purportedly wish for.
I believe taking action is the right thing to do, as these private messages are becoming a incessant irritant to many users of the forum. Freedom of speech doesn't entail anonymously spamming death threats and vulgarities. Even in the States, a country I believe is the strongest proponents of free speech, the cops still go after death threats. I believe there won't be a big hoo-hah if the user of the account in question mans up and posts his derogatory insults in the forum instead of via PMs.