Chilldoubt //Andy,
Humour in any form is generally wasted on you. It would appear sarcasm(in light of current events in the US) is too. //
I would argue that humour is not at all wasted on me - and I think I am better qualified to comment on that observation.
If you feel the need to tell people that you are joking, that suggests that the comment is open to misinterpretation - specifically as being a view with which you concur.
In other words, how funny is a comment, if you, the writer, need to tell people that it's funny, in case anyone gets the wrong idea?
That suggests to me that it is you who has the out-of-kilter sense of humour!
Don't give up your day job!!