If that fails, they would instead try to out-shout you by extolling the evilness of BN or Umno or police or whatever else under the sun.
In the case of Saturday's riot in KL, they know they can't divert from the issue. People were so upset with the barbaric behaviour of the rioters that no matter how hard they try to divert the issue by telling people how expensive Rosmah's handbags were, the trick simply wouldn't work.
So, the next best thing was to try blaming everything on everyone else on the government's side. In this case, the primary target was the police.
Here is an example of a comment from my posting Punish them at the ballot box (and in court), by this blog's regular troll, a DAP cybertrooper who identify herself as Kluang girl.
Funny really, normally in western countries its the protesters forming the human chain and riot police charging at them with batons, shields, etc. but here the "peaceful" protesters are the ones charging at the police, swearing, pushing and kicking.
And here is the video of this incident
As you may observe, the policemen, who were not in riot gear, purposely broke their human chain to avoid an altercation which would have happened if they had stood their ground. You can hear them telling each other, "biarkan, biarkan...."
Photos courtesy of THESTAR by AHMAD IZZRAFIQ ALIS