Buz, you said
People who use these terms should stop and think what they are saying .....
Sometimes a person using these terms does exactly that.
I could have said
Go take a flying fornicate at a rolling donut
Go have flying sexual intercourse with a rolling donut
Go take a flying shag at a rolling donut
Go and flyingly copulate with a rolling donut
And many, many more. However, the expression I chose doesn't have the same grammatical difficulties at the examples given. I would have got the same meaning across if I had said
Bugger off
Piss off
Fuck off
None of those, however, express the feeling that the instruction given is thought, by the writer, to be more productive than the inane drivel being spouted in the first place.
I could have gone all Scottish and said
Away and play on the motorway (freeway for US cousins)/play tig with the traffic
Away and pu' flo'oers (go pick flowers)
Away and claw yer simmit/raffle yer yumyum
Away and boil yer head and fry yer face while yer at it
I don't think I'd have been understood by the majority on this board.
On the other hand
Go take a flying fuck at a rolling donut
is understood by everyone on the board, says exactly what I wanted to say, in the way I wanted to say it and conjures up such a lovely image. Profanity does have it's place and, as said by someone else, it's a lot cheaper than a psychiatrist. Sometimes the topic of discussion is nothing to do with mechanics, science, food, nutrition and everything to do with personal attacks and these personal attacks, while containing no profanity, are more offensive, more insulting, more foul and more immoral/amoral than the use of profanity.
I see the use of profanity as a sign of moral, mental, cultural, and communal depravity. The more it prevails, the more it depraves and corrupts.
You can manage all of this without using profanity. If the only yardstick you are going to use in determining the above is the use of profanity, then you're going to miss alot of moral, mental, cultural and communal depravity.