[nodata]

You'd see their dns lookups.

[Kiro]

So basically I can see if my neighbours are surfing on porn sites regardless of WPA or SSL/TLS?

[chopin]

If you break their WPA, then yes, you can see which servers they connect to. For your purpose that possibly would be enough to know.

[icebraining]

Regardless of WPA, no. Regardless of SSL/TLS, yes.

[noselasd]

If the WiFi uses encryption, DNS is encrypted too.

[nodata]

Yeah but without wifi encryption, and with SSL you can still snoop on DNS traffic.