Information about Token Lists can be found here. Most of these are maintained by other projects or communities independent of Uniswap. Uniswap does have 1 token list that it controls itself (tokens.uniswap.eth), so perhaps there could be a section of the forum specifically for people to propose additions and removals from this list.
We should try to avoid a situation where a bunch of people post on the Uniswap forum to shill their project tokens - this would be a huge distraction and waste of energy, and would likely increase rather than reduce scam attempts.