I like 'em if they're real! If you want them with a refractor though, I'd at least lean towards semi-real, by sticking something on the dew shield. One protrusion will create a spike on both sides. Another 90 degrees off will create a typical 4-vane Newt appearance. Wires all the way across would also work.
The ones generated here are both too perfect and too flawed. And too prolific. Mark beat me to it, but the spikes are actual diffraction, so if bright enough you should get a rainbow-like effect. I presume if someone knew how to analyze the spikes, it would be real spectral information about the star.
Here's a deep crop on Hatysa next to Orion, taken this month. Pardon the crudity here, as I am still working out massive gradients due to my quite light-leaky new Newt, along with some seriously funky star shapes caused by the MPCC. But the color diffraction is obvious, and can just be seen even on the smaller spikes of the dimmer stars. Oh also I clearly need to get my vanes straight and in line with each other, but that's another dose of reality compared to the too-perfect false spikes from that program. My image also doesn't show any spikes from the Trapezium. Likewise, a recent integration on M81 shows no spiking of the galactic center.
Startools does in fact have a module that can create more accurately-modeled diffraction effects of both Newts and refractors, with a load of options even down to screws, mirror clips, secondary size, and focuser protrusion. It's just art if you were to include them in a final image, and in discussing it recently the purpose of the module was actually to help teach PSF's.