Wow... so much fighting in one thread.

... anyways, i agree with LW. Even if you disable burrowing, I think lurkers can still burrow. After all, if lurkers couldn't burrow in melee games, they would be worthless.
What you could do, though, is have a location center on a lurker. This location shouldn't have anything but "low ground" checked. Then, when a lurker is brought to this location, remove the lurker and create a new one (without properties). Hypertriggers will help.
[right][snapback]141597[/snapback][/right]
There is no location level for burrowed units. They are included in the ground locations as though they were unburrowed.
I'm currently testing something. If needed, you then should use the burrow detection system.