"Gated communities"......

[lindil]

It's odd that in such a "magical" land, the Orcs can freely wade across the Nimrodel, and that Gollum can penetrate the borders, even going so far as to climb the tree where Frodo and Sam are sleeping. It is only Haldir and his troop's assault that keep the enemy at bay.

A common misconception of Lorien is there was a Melian style 'Girdle' around it. The above mentioned orcs prove there was not.

I imagine that no orc WANTED to go into Lothlorien, it probably pained them in a way similar to Gollum's revulsion at things Elvish. But they could, when they had to.

Many communities Rivendell, BRee, Shire [prior to the edict] Moria in the days of Eregion, Laketown have established a nd reasonable means of entering. Other places such as Lothlorien [and in the first age Gondolin, Nargothrond, Doriath], Fangorn,Thranduils realm [to dwarves at least] Old FOrest do not. You risk your life to try and enter unbidden.

DaveM: have you been reading V. Fleiger's [sp?] book on 'Time' perchance?