| What do you mean by posting to political forums?
| If you're posting comments then what does your
| screen size matter?
|
| Anonymity is enhanced by having a commonly-used profile, and your
| profile includes screen size and colour depth as reported by the browser.
|

Ah. I did, indeed, miss the point. Thanks.
Interesting that so many other people
understood right off. We must have more
than a few rabble rousers here.

In that case, to the OP, you might want
to take a look at extensions like Secret Agent
for Firefox, which allows you to rotate userAgent
and spoof such things as Accept headers that
are now being explored as a way to provide
unique IDs for site visitors.