... that in normal home or commercial use is a higher amperage Edison Plug.
I believe you might be confusing voltage and amperage. Unless I am missing something, the connector shown is a 15-amp connector, which is exactly the ampacity of a standard household outlet, except this one is for 250-volt nominal systems. Typically this is derived from the leg-to-leg voltage of either a split-phase system (220-240 VAC) or a three-phase system (208 VAC). (The 30-amp, 250-volt connector is similar, but larger. I can't tell for sure from the photo, but I am pretty sure the station lighting is a 15-amp connection, as is the block heater).
Also, "Edison plug," while not incorrect, is a term not really used in the electrical industry, outside of the theater and movie gaffer/grip trades. The more common terminology is "NEMA," which stands for National Electrical Manufacturer's Association. The pictured connector is technically a NEMA 6-15P.
... however any one can use a plug for any purpose, to discourage anyone from pluging in a standard plug that would do damage to something ...
This is not correct. Plug and receptacle voltages and ampacities are strictly governed by code. You are not permitted to use a 250-volt plug for 120-volt service, because of the danger that someone might accidentally connect it to a 250-volt receptacle, in which it would fit. The whole NEMA panoply of plugs and receptacles is designed to prevent exactly this. (There is a limited exemption for systems of 30 volts, nominal, or less). The idea is that simply looking at the plug or receptacle will tell you what voltage and ampacity it uses, and only connectors of properly matched voltage and ampacity will mate.
There are, however, accepted methods to achieve what you describe. Most typically, a locking-type plug and receptacle are used to discourage casual use of receptacles or unintended connections to plugs. Every straight plug and receptacle has a corresponding locking type, so in the case of 15-amp, 250-volt service the correct connector would be a NEMA L6-15, where the "L" stands for Locking.