How about telling the Channel 10 advertisers what you think of them supporting Andrew Bolt.
Glen Beck, infamous for spouting ultra-right wing views, has been effectively fired from Fox News. It appears that a large number of high profile advertisers pulled out, not wanting their products to be associated with his unAmerican sentiments. (You'd think the son of Lachlan Murdoch might have learnt a lesson from this.)
It will be interesting to see which companies support Andrew Bolt. So far he has been able to survive on the ABC Insider's program, which doesn't have advertising, and with a blog buried in a newspaper that has a lot of different journalists, some quite sane and rational. He has never been exposed out on his own before.
I might even watch one of his television episodes (with the volume turned off) just to see which businesses support him - and write to these advertisers letting them know what I think of their support for him and his opinions. Hopefully a few other people will do the same.