hmm, true but aren't thosands of proxies created every day?
Yes. No matter what you do, the only completely secure network is that removed from the internet, turned off, locked away, and sealed off from anyone having any type of access. No matter what you do, there will always be some way around it, the goal is to mitigate that so that 'most' people won't. If you deny access to the most common public proxies, you will be able to get 'most' of them and thereby only your most technical (and even then, most devoted - for someone to spend the time to look for a non-common public proxy and set it up they would have to be dedicated, and you're going to have trouble with them anyway, they might find another way to do it - pipe it through some other type of connection, bounce it off an intermediary device, etc...)
is there a way i can fetch most proxies automartically?
Did you try a Google search for this? I'm betting there is a site that has this list, you could create a script to do an HTTP GET req on a few of hte most common pages to get their daily list, or weekly, monthly, etc...