[squid-users] Squid Reverse Proxy. Attempted connections to domains we do not host?

We are seeing entries like this in our squid access log:

1376290358.781 151 198.2.208.203 TCP_MISS/200 916 GET
http://toolbarqueries.google.com.hk/tbr? - HIER_DIRECT/74.125.237.18
text/html
1376290358.813 150 198.2.208.203 TCP_MISS/200 916 GET
http://toolbarqueries.google.com.hk/tbr? - HIER_DIRECT/74.125.237.18
text/html
1376290362.235 151 198.2.208.203 TCP_MISS/200 914 GET
http://toolbarqueries.google.com.hk/tbr? - HIER_DIRECT/74.125.237.18
text/html
1376290369.401 276 46.102.93.254 TCP_MISS/200 4850 GET
http://www.baidu.com/ - HIER_DIRECT/180.76.3.151 text/html
1376290370.041 663 199.180.100.170 TCP_MISS/200 9183 GET
http://www.google.tm/ - HIER_DIRECT/74.125.237.120 text/html
1376290370.455 1128 216.244.78.163 TCP_MISS/200 12491 GET
http://www.google.com.uy/ - HIER_DIRECT/74.125.237.119 text/html
1376290375.713 3449 198.52.120.152 TCP_MISS/302 840 POST
http://shelivedinashoe.com/wp-comments-post.php - HIER_DIRECT/97.74.26.128
text/html

It looks like someone else's traffic is somehow being routed through our
proxy??

How can this one even happen:
1376291144.757 879 216.244.78.166 TCP_MISS/302 1057 GET
http://203.208.46.128/search? - HIER_DIRECT/203.208.46.128 text/html ?

No idea what this means. I know I could add entries like this by creating a
hosts file entry to point fake.domain.com to our server but surely it's not
people doing this?

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