It depends on the situation and level of time investment.
If it’s someone you just met and immediately didn’t vibe with I think it’s fine, no time invested
If you’ve been on a date with them it’s kinda expected to turn them down. Time has been invested, if it’s a no don’t let them waste time.
If you run into them regularly it’s a bad idea regardless because leaving them on perpetual read with no resolution creates tension.



They don’t take desperate people they take violent people.
If they’re desperate that’s more fuel for their racial hatred.