Sometimes when I'm waxing lyrical on some point that gets my goat (see what I did there?), I am told to pipe down and divert my ire towards some more pressing concern. So, if I'm criticising (say) creationists, someone might say, "There are millions of people starving - why are you complaining about moronic anti-scientists and not doing something about THAT? Surely that is a bigger problem?" And then if we go off and start trying to tackle that, we're accused of not caring enough about AIDS or abused children etc.
A goat yesterday.
The issue is not that these are not all difficult and important problems - what is really happening is that the Billy Goat Gruff strategy is being employed against you, in order to get you to stop criticising whatever you are criticising. It is not because the person really cares about this other issue - it is simply to try to divert the argument to somewhere they are more comfortable. It is a rather dishonest and devious debating strategy (and we've all used it - let's try not to, eh?)
So the next time some eejit comes trip-trapping over my bridge, forget about asking me to wait for the next one - I'll eat this one and the next one too.