Well, if this story that performers can't look him in the eye is true... he isn't inaugurating himself with dignity...
I think this protest is classier than most. Noone is wearing a Bush Mask with a Nazi Uniform or displaying other vulgar or crude messages. They are doing it this way because he refuses to allow dissenting opinions to be around him (see.
Free Speech Zones) After winning the election with 51% of the vote he believes he has a mandate and says he "I've earned capital in this election and I'm going to spend it". What does that mean? More of the things that 49% of voting americans disagreed with like dismantling Social Security for instance. That alone is reason enough to not let up on him and make it evident to him that there are many americans who vehemently disagree with his policies.
Turning their backs is not making a nuisance. It is representing the large minority of americans who took part in the 2004 elections.