Just fork and have a shit coin.
Don't worry, Bitcoin Knots is programmed to activate BIP-110 unconditionally. It doesn't matter, if they will reach 0%, 1%, 2%, or anything below 50%. It will always activate, so they will always fork, as long as they will be in a minority. A single non-BIP-110 block is all that is needed, to split them to their own network.
By the way: forks like BIP-110, or what Paul Sztorc is going to create, will only lead to pushing more on-chain data, that there would otherwise be. Just because people will want to split their coins, to sell their forkcoins, they will start making transactions on both chains, and they will hope, that the miners from minority chains will confirm them (because only then, selling will be successful, and only then these people will split; if they will have 0% hashrate instead, then they will be stuck, and we will still need to deal with them).
I guess if they will have 1% or 2%, then it will be a positive scenario: they need some miners, producing some blocks, to split. Only then they can switch to the coin they want, and leave us alone. Now I just wonder, if their miners will have the courage to produce one or two blocks per day, or if they will stop, because of being unprofitable. Because a lot of blocks, worth a lot of money, is needed, to really bring down their difficulty to produce one block per 10 minutes. Unless they will change the code, and adjust it, like BCH did.