Side hustle owners: how do you stop fake leads/signups without killing conversions?

I run a small side hustle site and lately I’ve been getting fake signups/leads that waste time and mess up tracking. Basic spam protection helps a bit, but stricter filters start blocking real people too, which hurts.

For those running side hustles, what’s your practical setup to reduce fake leads without adding too much friction? Any simple workflow for triaging suspicious entries and tuning rules over time?