Perhaps, or we could send very small quantities of < backing asset > to the liquidity software work unit, and ban users that do steal the funds.

We could make it an invite based system or mimic Dash's masternode idea and have users lock funds away in order to run the software, so if they were to try to steal funds from the work units they would lose their deposit?

But yeah, it's not a simple thing to solve but if someone can figure it out we could distribute this to thousands of volunteers from around the world.