Using .htaccess to block spam

Hi

I’m having a go at using the htaccess file in the WordPress 1.5 blog I’m using to block comment spam.

So far I’ve come up with fairly big list as it is below.

Is it better to just use IP addresses or is it better to go by the domain name?

Thanks

>>>>>>>>

From .htaccess file

Order Deny,Allow
deny from .jupiterhosting.com
deny from .blackgirlsporn.*
deny from .cnnporn.com
deny from .sn333.com
deny from .asiansex.*
deny from .asiansexcam.*
deny from .asianporncam.*
deny from .mature-swingers-video.*
deny from .vcbmerfya.com
deny from .lesbian.*
deny from .lesbiandating.*
deny from .lesbiancruises.*
deny from .lesbianss.*
deny from .sexpasw.com
deny from .tramad.2.forumer.com
deny from .buytramadol.kw.pl
deny from .tramadol.*
deny from .swiporn.com
deny from .porn.*
deny from .porn-movie.*
deny from .pornclips.*
deny from .freeporn.*
deny from .freepornvideo.*
deny from .free-porn-downloads.*
deny from .superiormartialarts.com
deny from .liveporn.*
deny from .warez-vip.*
deny from .cwebt.com
deny from .blonde.fe.pl
deny from 24.116.106.158
deny from 58.74.38.139
deny from 58.226.223.2
deny from 58.233.49.178
deny from 59.1.217.37
deny from 59.5.130.141
deny from 59.5.189.54
deny from 59.120.5.209
deny from 59.3.221.134
deny from 61.41.201.98
deny from 61.136.12.75
deny from 61.185.219.235
deny from 61.219.62.202
deny from 62.69.128.252
deny from 62.128.179.2
deny from 62.206.85.61
deny from 62.159.35.211
deny from 64.34.174.104
deny from 64.34.193.106
deny from 64.132.71.129
deny from 66.135.34.11
deny from 66.139.76.153
deny from 66.139.77.214
deny from 67.166.76.190
deny from 70.188.244.38
deny from 70.224.51.166
deny from 71.100.161.212
deny from 72.20.1.86
deny from 81.190.46.199
deny from 82.160.71.134
deny from 84.122.2.47
deny from 85.25.17.210
deny from 85.91.146.206
deny from 87.101.240.8
deny from 124.50.245.139
deny from 166.121.37.9
deny from 200.36.161.148
deny from 200.84.167.197
deny from 201.25.98.91
deny from 201.17.160.252
deny from 201.222.69.7
deny from 202.221.164.199
deny from 202.226.144.102
deny from 203.113.13.3
deny from 203.213.217.227
deny from 210.19.67.14
deny from 210.77.60.160
deny from 211.45.195.178
deny from 211.170.81.5
deny from 211.173.166.36
deny from 211.192.45.160
deny from 211.200.170.109
deny from 211.211.230.73
deny from 211.223.60.69
deny from 211.237.161.38
deny from 212.227.92.144
deny from 212.241.195.24
deny from 213.91.146.2
deny from 213.189.16.178
deny from 213.189.149.226
deny from 217.158.68.124
deny from 217.219.112.190
deny from 218.28.2.62
deny from 218.56.8.72
deny from 218.98.38.77
deny from 218.98.38.100
deny from 218.123.156.130
deny from 218.137.244.24
deny from 218.209.145.99
deny from 218.238.103.61
deny from 219.49.198.6
deny from 219.131.196.123
deny from 219.138.199.178
deny from 200.84.167.197
deny from 202.157.15.53
deny from 220.13.32.106
deny from 220.119.106.221
deny from 220.119.158.14
deny from 220.81.43.211
deny from 220.83.25.26
deny from 221.117.99.53
deny from 221.145.192.40
deny from 222.100.241.190
deny from 222.108.175.147
deny from 222.112.156.108
deny from 222.126.48.144
deny from 222.238.198.58
deny from 222.99.104.126
allow from all