These addresses lack domains or include over 100 hosts per IP address (which may produce false positives).  It is more efficient to drop/block at the perimeter in and out, rather than listing them in Snort. 

173.192.194.192			Nikolai Lidiaev
173.192.194.193
173.192.194.194
173.192.194.195
173.192.194.196
173.192.194.197
173.192.194.198
173.192.194.199
173.192.194.200
173.192.194.201
173.192.194.202
173.192.194.203
173.192.194.204
173.192.194.205
173.192.194.206
173.192.194.207
173.192.194.208
173.192.194.209
173.192.194.210
173.192.194.211
173.192.194.212
173.192.194.213
173.192.194.214
173.192.194.215
173.192.194.216
173.192.194.217
173.192.194.218
173.192.194.219
173.192.194.220
173.192.194.221
173.192.194.222
173.192.194.223			Nikolai Lidiaev
64.74.223.0/24			64.74.223.0/24 route for Demand Media eNOM-SPACE-IN-SJC 
67.228.250.129			Nikolai Lidiaev
67.228.250.130
67.228.250.131
67.228.250.132
67.228.250.133
67.228.250.134
67.228.250.135
67.228.250.136
67.228.250.137
67.228.250.138
67.228.250.139
67.228.250.140
67.228.250.141
67.228.250.142
67.228.250.143
67.228.250.144
67.228.250.145
67.228.250.146
67.228.250.147
67.228.250.148
67.228.250.149
67.228.250.150
67.228.250.151
67.228.250.152
67.228.250.153
67.228.250.154
67.228.250.155
67.228.250.156
67.228.250.157
67.228.250.158
67.228.250.159			Nikolai Lidiaev
69.64.152.0/22			69.64.152.0/22 route for Demand Media eNOM-SPACE-IN-SJC 
69.64.156.0/23			69.64.156.0/23 Route for Demand Media eNOM-IP-IN-SJC