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I recently rescued a survivor from a portable toilet in No Zombies Allowed. Normally, this nets me some supplies, cash, and coins.

This one, however, awarded me by building a security fence all along my town. My first thought is that this does nothing but give my town a nicer look.

Does this fence serve any real purpose?

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I have barely found information on google; the only thing i found most relevant to your answer is posted below – waifu Oct 18 '12 at 3:07

Surfing around google, I chanced across the No Zombies Allowed Wiki.

I was looking for an answer to your question, and I chanced upon this in the FAQ.

How do I upgrade Lola's tower?

Every 5 or 6 survivors you rescue from the portable bathrooms, one of them will upgrade your tower and all your walls near your depots.

Thus, the result is not merely a cosmetic upgrade, but also a defensive boost to your walls and fortifications.

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You are correct in thinking that it just makes your town look nicer sadly. Would be nice if it had other features.

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Is there any chance you could provide a source for this? – Fluttershy Oct 15 '12 at 16:05

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