Blocking spiders is all about personal choice, do a little research and find out whether you want to cater for that country and whether they add value to your site!, when Deepnet Explorer are visiting go to who's online and at the bottom there's a dropdown box for "Show Useragent?" select Yes, then check out their useragent, you can enter any or all of the UA string, so if they actually do have Deepnet in the UA then you just enter that on its own line in the list