Can Wireless Mesh Be Trusted?

Interesting topic! I have a question for the wireless mesh industry experts out there...

This topic sometimes comes up with our customers (mostly large critical infrastructure and defense). Their perception is that wireless mesh networks can't be trusted - they can too easily be disrupted through EM interference. Can anyone comment if this is still the case? Are directional antennas a possible solution? Are there innovations coming up that might address this, and make it suitable for more security-critical applications than just parking lots?

NOTICE: This comment was moved from an existing discussion: Ubiquiti $99 Mesh Node Challenges Wireless Competitors

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