The much preferred version would be:
"It's always a great day when liberal loons try to sound superior."
In fact, I would say that "try and" is grammatically incorrect--although I know you argue that it is a register situation.
My feelings are that “register” is being used to excuse poor grammar.
You've negated your argument from the outset, Frank. A much preferred version
or even a preferred version
or even a little bit better version
all point to register differences.
At your recent dinner meeting/party/soiree [register differences] with Kicky, Lola, Bernie, ..., I'm certain that you were not using the highest register available for English. Had you done so, you would have all sounded like idiots, if not to yourselves, at least to those around you. Agreed?
So register obviously is vitally important in determining word choice/grammatical structure.