Yes, I do believe this campaign is somewhat distasteful, even though I'm not Margaret Thatcher's biggest fan.
To me there is a clear distinction between having respect for the dead and scrutinising the policies and legacy of an important political figure. Furthermore, what will getting 'Ding Dong The Wicked Witch Is Dead' into the charts, or even to number one, actually achieve? It certainly won't reverse any of the policies she enacted, or repair the damage which her government caused to some communities.
In reality this campaign is just 'celebrating' the death of an ill old-lady who served our country. We've had since her election in 1979 to scrutinise her political actions, hence why the debate would of been far more relevant back then.
Obviously everyone is entitled to their political opinion, but this campaign just seems to me like a cheap swipe, rather than part of a constructive political debate.