And yes, you can really get a turbine start wrong. I have seen it from right seat! A few turbines I have flown have very strict procedures about clearing fuel after a failed start.
And it should be with light aircraft piston engines. This is where I think it should be. Mandatory placards: 1. 'Over priming may cause an engine fire'. 2. 'Caution: the engine must be clear of residual fuel prior to priming'.
The effective fuel clearing procedure should be detailed in the Flight Manual/POH and with expanded explanations.