It's rules like this that make us glad we so often have a GM for our 8th ed battles. We house rule 'clipping' and slide to maximise every time, purely because even in a fantasy world the idea of guys standing around, maybe 9 in a horde, with other giuys ranked behind, all doing nothing while one or two guys at the corner fight, seems (and looks) stupid. I would be embarassed to put a pic of such in a battle report. We always find a way of not having a combat fought in such a silly way.
It might not be the rules as written, but hey, when we have loads of fan-made army lists and house ruled units, in a campaign where although points and the like are accounted for in great accuracy, battles rarely involve 'equal' value forces, fudging some RAW rules to avoid such disappointingly unconvincing situations is the least of our crimes.
99% of the rules we stick to rigidly, as they work and don't seem too daft. But when a rule tries to force such daftness, we have our houserules.
I suppose it's stuff like this which could make playing with strangers uncomfortable! But even 8th ed is most usually played amongst old friends, I reckon!