I cannot prevent spam comments from my joomla site - <snip> and <snip>
I followed many ways - deleted all comments through db and frontend
Installed anti spam plugin R Antispam plugin, but still i am getting spam comments. After installing this plugin number of comments reduced but cannot see 100% block.
I would say now the spammers have found your site you are in trouble.
I suggest either making people sign up to post comments and you may be able to implement some more antispam code into that. But the best thing would be to check the comment before it is posted and only allow the legitimate ones through.