Thank you for this information.
If Option 2 is the final choice, the 'Post Code' and 'Telephone' fields will be dropped and we will simply log IP addresses and block proxies to prevent misuse of the Spacedrop.
Your welcome ofc.
The
Bad-Behavior script is quite good for preventing 'abuse' issues:
http://bad-behavior.ioerror.us/about/ when combined with a php http:BL API Key.
EDIT: Blockscript -
http://blocked.com - is actually free for a certain number of user requests per. month and blocks numerous open proxies. Your server requires the ioncube loaders for Blockscript.
You can also find updated proxy lists here:
https://www.iblocklist.com/lists.php - and a list of Tor exit nodes from the Organizations tab. I do not really approve of any website blocking Tor exit nodes, although if you were to only block the space drop page for the initial giveaway, then I guess its not so bad. It would help to ensure a fair distribution.
Non-collection and/or minimal collection of users data, where possible, is certainly the best option.