Obviously there are as many opinions of what are correct (wittiest or most exact or what?) Limerick rhyme and meter as there are contributors to this marvellous site. Let’s all face this and let us continue to do our very best in our mutual efforts to have fun and to, eventually, create the most perfect Limerick that has ever been seen!
There once was a party in Lerwick
Where things started go quite hysteric
I threw a full glass
It hit some bird's arse
All night then her bottom I’d to lick
Sorry to interrupt your harsh mood but anyway…

...my humble effort to give the 'Lerwick'-one a happy ending is way out of tune!

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Let him without wit cast first line, http://www.ajokes.com/jokes/845.html

The lack of wit can be a sign Let's not descend into more scansion wars. The way I see it is, if you're getting annoyed by one game, then just play another instead. That's what I do these days.

With a nice butter'd scone ;-) - I'm on the fence about this one. Scansion wars definitely suck, but although there are a lot of opinions about what makes a good limerick, that doesn't mean there is no convergence, and that all conventions can safely be ignored. IMO, a good limerick is a successful interplay between form, coherence and humour - it's not necessary for all to be perfect and sometimes the one or the other takes precedence, but if all three are weak, why bother? And while it's true players can just look the other way for a while if the quality descends below their personal threshold, sometimes that means witty people don't bother to post any more and the enjoyment of the whole community can degrade a bit.