BleepingComputer.com: Detecting Browsing/internet History On Home Wireless Network?

i started sharing wifi with my neighbors last month, they broadcast the dsl signal from next door via their router in exchange for a small payment from me. it's just a regular home network setup, i just enter the network key to get access. i am wondering if it's possible and/or easy for them to look up what internet browsing (mainly web, but what about ftp or peer-to-peer filesharing) i've been doing. occasionally i visit the 'seedier side' of the internet, both for work and pleasure, but don't think they're the kind of people who would appreciate that at all. this something i should worry about?

Depends on if they're monitoring the router logs. Or if they even have
the router set up for logging.

so it's fairly common for a router to log web traffic and the like?

Most routers have the ability...just up to the owner if its enabled:
Here's some from my routers

192.168.1.100 www.bleepingcomputer.com HTTP
192.168.1.100 frozenwebhost.com 22
192.168.1.100 mail.classicnet.net POP3
192.168.1.100 www.bleepingcomputer.com HTTP
192.168.1.100 lawnlab.com 22
192.168.1.100 frozenwebhost.com 22
192.168.1.100 www.teamspeak.org HTTP
192.168.1.100 frozenwebhost.com 22
192.168.1.100 www.bleepingcomputer.com HTTP
192.168.1.100 errdocs.myway.com HTTP
192.168.1.100 my.myway.com HTTP
192.168.1.100 utm.trk.myway.com HTTP
192.168.1.100 c4.myway.com HTTP
192.168.1.100 googlemail.l.google.com 443
192.168.1.100 www.l.google.com 443
192.168.1.100 mail.coolaccess.net POP3
192.168.1.100 frozenwebhost.com POP3
192.168.1.100 205.156.51.200 HTTP
192.168.1.100 mail.classicnet.net POP3
192.168.1.100 205.156.51.200 HTTP
192.168.1.100 207.46.2.30 1863
192.168.1.100 205.188.9.104 5190
192.168.1.100 216.155.193.183 5050

[ALLOW:adc.aws.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 04:55:11
[ALLOW:adc.aws.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 04:55:11
[ALLOW:pub.weatherbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 04:55:12
[ALLOW:adq.nextag.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 04:55:12
[ALLOW:adq.nextag.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 04:55:12
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:00:08
[ALLOW:weather.noaa.gov] Source: 192.168.0.4 Wednesday, 04 Jan 2003 05:02:43
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:05:09
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:10:09
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:15:09
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:20:09
[ALLOW:isapi60.wxbug.com] Source: 192.168.0.3 Wednesday, 04 Jan 2003 05:25:09
[ALLOW:weather.noaa.gov] Source: 192.168.0.4 Wednesday, 04 Jan 2003 05:42:43
[ALLOW:weather.noaa.gov] Source: 192.168.0.4 Wednesday, 04 Jan 2003 06:22:43