I think it's clear that:

• Different people have different creepiness tolerances.
• Creepiness is significantly associated with mainstream social status (as opposed to status within the LW group).
• Most people, including most LWers, find it stressful to be around very creepy people.

Therefore, I propose the following system to reduce the stress of creepiness in LW groups while still maintaining a "big tent."

• In every city large enough to support a large LW meetup population, there will be multiple tiers of LW groups. (Use common sense in determining optimal group size. I doubt any city beyond SF/NY has enough people to implement this right now)
• These groups will be explicitly ranked by status (or more precisely, degree of tolerance - with high status groups having the lowest tolerance for creepy behaviors)
• Membership in the lowest-tier group is automatic; membership in all higher-tier groups is conducted through an interview/probation process. This review process involves observers from the immediately higher- and lower-tier groups.
• Membership in a higher-tier group automatically grants membership all lower-tier groups.

In this way, we'll have a series of meetup groups that accommodate people of all creepiness tolerances. People who dislike dealing with creepy people can choose groups that exclude them, but the automatic membership in lower-tiered system avoids the problem of losing the interesting-but-creepy people. The only people who miss out are creepy people with low creepy tolerances, but we probably don't want them anyway.