The host avoids providing clear details about the meet-up, location, or activities, or changes plans frequently without good reason.
The host insists on meeting in a private or secluded location, or pressures you to meet just one-on-one, especially if the original plan was a group event.
The host immediately asks for overly personal information (e.g., home address, financial details, relationship status) that is irrelevant to the meet-up.
Details provided by the host (e.g., their identity, the nature of the event) seem to change or don't align with what you've seen on their profile or in the event description.
The host uses overly aggressive, demanding, or disrespectful language in their communications.
The host is excessively complimentary or seems to be trying to rush intimate connection quickly.