Banning only ip will not solve your problem you should ban the browser that is used by the bot.
this isn't bad idea, but how ?!
and if that be done correctly, then anyone else that using same browser is banned too.
note to faucets admins: be attention about this, solvemedia is better for your faucet than recaptcha!
you willl ban all users using chrome hahahah I think isn't a good idea at all
if you wanna do this, you can google "faucet owners against bots site:bitcointalk.org" maybe in the last 2 pages will be a php code with this thing
recaptcha or solvemedia, two bullshits...
keep doing this reviews, try to ban all range of the IP's, I think it's the better way.. you can order by IP too and try to find various IP from same range