Your objection is that your opponents use it as an objection. Too damn bad, it's still accurate.
The Australian gun control efforts include confiscation. Keep up your own slogan of 'no confiscation', but you're actually on the other side of your wall/fence example than you think you are.
I am now fully aware of what the contention is. You're too focused on opposing all the criticisms of the Australian gun control efforts that you've stopped thinking them through. It included confiscation and you should support it based on your position on those efforts. If you want to argue against the 'slogan' use of the word, dissect the unthinking use of that and how confiscation is part of many, many laws
including current US gun laws.
This is fully ridiculous but does provide a lot of use in illustrating just how 'tribal' this debate can be. Gun control opponents call it confiscation, and object to it based on that, must be a lie! Gun control measures by necessity include elements of confiscation, it's slavery/anti-freedom! The other side says X so I must oppose X and mock people who say X!
No wonder most people quickly leave these threads.