"Gravity

Yeah thats right gravity wanna fight about it?

If zombie were to lose basic reasoning skills as movies and rabid dogs lead us to beleive then the answer to killing them in great numbers is simple.

Park a crane near the edge of any great cliff or dropoff and have people in shifts take a position in a bucket hanging a safe distance past the cliffs edge and allow any tempted zombies to walk right off...

Mabey this wouldnt kill every zombie that fell but surely this would break most every bone in their bodys and make for an east cleanup...

Only trick would be to lure them to that location in the first place..."

"That idea is utterly insane. Luckily I like insane. But Jordan seriously what the hell actually made you think of that. If you say the hospital rooftop finally from left 4 dead then I wouldn't be suprised but if you came up with it just off the top of your head I will be extreamly impressed."

"well not necesarily unclimbable but un-rampable, like an old-growth california redwood."

"Lol fun idea and fairly simple but it would still require someone chopping and keeping a fire fed. Though this shouldn't be a huge limitation for a larger well established groups. it still uses wood which will likely be in short supply, In a short amount of time if your also using it to heat homes in the absence of electricity or gas."