This is a survey.

During one year I've developed and I've tested my own system to block and prevent proxy users and bots.

The system combine 4 techniques:

1. Honeypots
2. Checking public "Black IP databases" from internet
3. Analyzing the visitor ports and behavior
4. Checking our own database of block IPs related to bitcoin scammers built from our honeypots

For now, the system is just a PHP code. But, If there are people interested to pay for this kind of security for their sites, I could deploy it as an online service.

What is your opinion about this?