ck - I engage in this debate on a regular basis with AB'ers, and sometimes get castigated as a wimpy leftie by some of our more exciteable colleagues.
My stance on this type of issue is this -
Laws make us civilised, they allow for considered judgements and punishments that exclude self-righteous anger and thirst for revenge.
There is no point in getting angry about the fact that Castro has effectively escaped justice - it has happened, and nothing can be done about it.
The notion that some people would cheer his death is, in my view, an 'armchair' view - I think watching another human being die, no matter how deserving that death may be - would be far less of a gleeful occasion that some imagine.
So I step outside the 'I'd have pulled the switch myself ...' position, because I believe it is fuelled by self-righteous anger, and that no-one, if it came to it, could actually do that job.
To gnash your teeth and wail about Castro is only going to hurt your head, much better to concentrate on thinking about those he has left behind, who must try and come to terms with what has happened to them.