Only if somebody feels like/has the experience required for accessing your router through the port you've opened in order to allow people to join your server.
But can they hack you when you join a server? Like, if I join a server, is it possible for someone to hack me. Does it give them a open door to my comp?
Technically, if you just use the internet, you're already at risk if you do anything stupid.And you seem like the person who would click on anything advertising a "free anti-virus scan."
I was talking about blockland. How is that blockland related?
If you click links on Blockland that seem suspicious, you could be hacked, but that's highly unlikely.