One alternative is to allow a report without full documentation and a PoC. If it’s a dupe, mark it as a dupe, otherwise ask for the full writeup.
As for the problem of spammy submissions: charge a small nominal fee of $10 or so to submit, with a full refund if it’s a legit issue (even if it’s a duplicate).
As for the problem of spammy submissions: charge a small nominal fee of $10 or so to submit, with a full refund if it’s a legit issue (even if it’s a duplicate).