You are correct, but avitars become "invisible" (i.e. people get used to seeing it) after a few viewings.

That is why I have written a number of essays and encouraged my friends to link to them. In case any else would like to link, here is another: http://meteorologicalmusings.blogspo...ust-right.html

It is fine to change avitars. I'm just pointing out that I think a combination of techniques will be the most fruitful in the long run.