King's Gambit- Trash- exf4 Nf3 Nf6! and White's going to need both considerable luck and skill to hold
Budapest- Playable but just leads to a pleasant position for White that can be pressed comfortably
Latvian- Just Bad
Stafford- Tricky but objectively just gets Black a worse position
So, I'd say that from least to most dubious: Budapest, Stafford, KG, Latvian
Lets compare this opening to other crazy ones:
- Latvian gambit
- Budapest gambit
- King gambit accepted
You can even add others you like / encountered.
I know its dubious for OTB play, just want to hear opinion of some other players, how dubious you think it actually is compared other dubious openings.
I have to say i am intrigued by it. I love the dynamics it creates (KGA fashion). But engines give it very bad prospect, i also checked refutation and its very easy to refute.
How i see it: From the least dubious until most dubious:
1. KGA (fully playable, i play it every time i get a chance in OTB club games)
2. Budapesst gambit (playable OTB)
3. Latvian gambit (i am afraid to play it in long time controls)
4. Stafford gambit.

Honestly, i would love somebody to persuade me its not that bad, since its just so cool, funny and everything. But i have doubts about it