Online profiling is generally way more detailed than an IP and will include browser finger printing (agent string) and fonts loading, and much much more with some pretty impressive Javascript tricks.
For many people who follow your line of thinking via your blog and say the ads for VPNs and the like, they might feel they have achieved 'security' by obfuscating or hiding one small aspect of their on-line life. However, I think that worrying about your IP address and encouraging the same as a major 'Security Thing' is missing way more important aspects of IT security. Passionate write up, very well put and beautifully presented.
